diff --git a/css/theme/beige.css b/css/theme/beige.css
index 3b05467c2bfd74b96e9854d2ec2f778c504c17fe..1d9a88646f6652a11ccc8a0e5962343254102483 100644
--- a/css/theme/beige.css
+++ b/css/theme/beige.css
@@ -1,4 +1,4 @@
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
  * Beige theme for reveal.js.
  *
@@ -62,11 +62,11 @@ body {
 .reveal a:not(.image) {
   color: #8b743d;
   text-decoration: none;
-  -webkit-transition: color 0.15s ease;
-  -moz-transition: color 0.15s ease;
-  -ms-transition: color 0.15s ease;
-  -o-transition: color 0.15s ease;
-  transition: color 0.15s ease; }
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  -ms-transition: color .15s ease;
+  -o-transition: color .15s ease;
+  transition: color .15s ease; }
 
 .reveal a:not(.image):hover {
   color: #c0a86e;
@@ -85,11 +85,11 @@ body {
   background: rgba(255, 255, 255, 0.12);
   border: 4px solid #333333;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
-  -webkit-transition: all 0.2s linear;
-  -moz-transition: all 0.2s linear;
-  -ms-transition: all 0.2s linear;
-  -o-transition: all 0.2s linear;
-  transition: all 0.2s linear; }
+  -webkit-transition: all .2s linear;
+  -moz-transition: all .2s linear;
+  -ms-transition: all .2s linear;
+  -o-transition: all .2s linear;
+  transition: all .2s linear; }
 
 .reveal a:hover img {
   background: rgba(255, 255, 255, 0.2);
diff --git a/css/theme/default.css b/css/theme/default.css
index 087b9f27260a5c896452cf8119574e0a8510b7c8..9a2f7c6e2baf09ffb669d2f52179a3e3cf37f532 100644
--- a/css/theme/default.css
+++ b/css/theme/default.css
@@ -1,4 +1,4 @@
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
  * Default theme for reveal.js.
  *
@@ -62,11 +62,11 @@ body {
 .reveal a:not(.image) {
   color: #13daec;
   text-decoration: none;
-  -webkit-transition: color 0.15s ease;
-  -moz-transition: color 0.15s ease;
-  -ms-transition: color 0.15s ease;
-  -o-transition: color 0.15s ease;
-  transition: color 0.15s ease; }
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  -ms-transition: color .15s ease;
+  -o-transition: color .15s ease;
+  transition: color .15s ease; }
 
 .reveal a:not(.image):hover {
   color: #71e9f4;
@@ -85,11 +85,11 @@ body {
   background: rgba(255, 255, 255, 0.12);
   border: 4px solid #eeeeee;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
-  -webkit-transition: all 0.2s linear;
-  -moz-transition: all 0.2s linear;
-  -ms-transition: all 0.2s linear;
-  -o-transition: all 0.2s linear;
-  transition: all 0.2s linear; }
+  -webkit-transition: all .2s linear;
+  -moz-transition: all .2s linear;
+  -ms-transition: all .2s linear;
+  -o-transition: all .2s linear;
+  transition: all .2s linear; }
 
 .reveal a:hover img {
   background: rgba(255, 255, 255, 0.2);
diff --git a/css/theme/moon.css b/css/theme/moon.css
index d0836c0b31213ec76bd1f569d8932cf1f6f2b799..5aa2866593c060e5c05a15d6e988e532f370353d 100644
--- a/css/theme/moon.css
+++ b/css/theme/moon.css
@@ -1,4 +1,4 @@
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
  * Solarized Dark theme for reveal.js.
  * Author: Achim Staebler
@@ -62,11 +62,11 @@ body {
 .reveal a:not(.image) {
   color: #268bd2;
   text-decoration: none;
-  -webkit-transition: color 0.15s ease;
-  -moz-transition: color 0.15s ease;
-  -ms-transition: color 0.15s ease;
-  -o-transition: color 0.15s ease;
-  transition: color 0.15s ease; }
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  -ms-transition: color .15s ease;
+  -o-transition: color .15s ease;
+  transition: color .15s ease; }
 
 .reveal a:not(.image):hover {
   color: #78b9e6;
@@ -85,11 +85,11 @@ body {
   background: rgba(255, 255, 255, 0.12);
   border: 4px solid #93a1a1;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
-  -webkit-transition: all 0.2s linear;
-  -moz-transition: all 0.2s linear;
-  -ms-transition: all 0.2s linear;
-  -o-transition: all 0.2s linear;
-  transition: all 0.2s linear; }
+  -webkit-transition: all .2s linear;
+  -moz-transition: all .2s linear;
+  -ms-transition: all .2s linear;
+  -o-transition: all .2s linear;
+  transition: all .2s linear; }
 
 .reveal a:hover img {
   background: rgba(255, 255, 255, 0.2);
diff --git a/css/theme/night.css b/css/theme/night.css
index f4a8aea61f24c45f0b1e9630e5382c830e74342f..2ea3fc494a58b95dcc79454e0b08a5ef7ed2e75d 100644
--- a/css/theme/night.css
+++ b/css/theme/night.css
@@ -1,5 +1,5 @@
-@import url(//fonts.googleapis.com/css?family=Montserrat:700);
-@import url(//fonts.googleapis.com/css?family=Open+Sans:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Montserrat:700);
+@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic,700italic);
 /**
  * Black theme for reveal.js.
  *
@@ -50,11 +50,11 @@ body {
 .reveal a:not(.image) {
   color: #e7ad52;
   text-decoration: none;
-  -webkit-transition: color 0.15s ease;
-  -moz-transition: color 0.15s ease;
-  -ms-transition: color 0.15s ease;
-  -o-transition: color 0.15s ease;
-  transition: color 0.15s ease; }
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  -ms-transition: color .15s ease;
+  -o-transition: color .15s ease;
+  transition: color .15s ease; }
 
 .reveal a:not(.image):hover {
   color: #f3d7ac;
@@ -73,11 +73,11 @@ body {
   background: rgba(255, 255, 255, 0.12);
   border: 4px solid #eeeeee;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
-  -webkit-transition: all 0.2s linear;
-  -moz-transition: all 0.2s linear;
-  -ms-transition: all 0.2s linear;
-  -o-transition: all 0.2s linear;
-  transition: all 0.2s linear; }
+  -webkit-transition: all .2s linear;
+  -moz-transition: all .2s linear;
+  -ms-transition: all .2s linear;
+  -o-transition: all .2s linear;
+  transition: all .2s linear; }
 
 .reveal a:hover img {
   background: rgba(255, 255, 255, 0.2);
diff --git a/css/theme/serif.css b/css/theme/serif.css
index 2b1f4fd2ed4af5807056f5df9ddd01c230bc85fa..37833f651826f72bd1b024a833a273bed4e9fe70 100644
--- a/css/theme/serif.css
+++ b/css/theme/serif.css
@@ -50,11 +50,11 @@ body {
 .reveal a:not(.image) {
   color: #51483d;
   text-decoration: none;
-  -webkit-transition: color 0.15s ease;
-  -moz-transition: color 0.15s ease;
-  -ms-transition: color 0.15s ease;
-  -o-transition: color 0.15s ease;
-  transition: color 0.15s ease; }
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  -ms-transition: color .15s ease;
+  -o-transition: color .15s ease;
+  transition: color .15s ease; }
 
 .reveal a:not(.image):hover {
   color: #8b7c69;
@@ -73,11 +73,11 @@ body {
   background: rgba(255, 255, 255, 0.12);
   border: 4px solid black;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
-  -webkit-transition: all 0.2s linear;
-  -moz-transition: all 0.2s linear;
-  -ms-transition: all 0.2s linear;
-  -o-transition: all 0.2s linear;
-  transition: all 0.2s linear; }
+  -webkit-transition: all .2s linear;
+  -moz-transition: all .2s linear;
+  -ms-transition: all .2s linear;
+  -o-transition: all .2s linear;
+  transition: all .2s linear; }
 
 .reveal a:hover img {
   background: rgba(255, 255, 255, 0.2);
diff --git a/css/theme/simple.css b/css/theme/simple.css
index 00ab5c42fe18e6a92d4a2de489ccf829433ca33f..b8f31bc501dc1a4df5fda5127ca5aaf322831172 100644
--- a/css/theme/simple.css
+++ b/css/theme/simple.css
@@ -1,5 +1,5 @@
-@import url(//fonts.googleapis.com/css?family=News+Cycle:400,700);
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=News+Cycle:400,700);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
  * A simple theme for reveal.js presentations, similar
  * to the default theme. The accent color is darkblue.
@@ -52,11 +52,11 @@ body {
 .reveal a:not(.image) {
   color: darkblue;
   text-decoration: none;
-  -webkit-transition: color 0.15s ease;
-  -moz-transition: color 0.15s ease;
-  -ms-transition: color 0.15s ease;
-  -o-transition: color 0.15s ease;
-  transition: color 0.15s ease; }
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  -ms-transition: color .15s ease;
+  -o-transition: color .15s ease;
+  transition: color .15s ease; }
 
 .reveal a:not(.image):hover {
   color: #0000f1;
@@ -75,11 +75,11 @@ body {
   background: rgba(255, 255, 255, 0.12);
   border: 4px solid black;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
-  -webkit-transition: all 0.2s linear;
-  -moz-transition: all 0.2s linear;
-  -ms-transition: all 0.2s linear;
-  -o-transition: all 0.2s linear;
-  transition: all 0.2s linear; }
+  -webkit-transition: all .2s linear;
+  -moz-transition: all .2s linear;
+  -ms-transition: all .2s linear;
+  -o-transition: all .2s linear;
+  transition: all .2s linear; }
 
 .reveal a:hover img {
   background: rgba(255, 255, 255, 0.2);
diff --git a/css/theme/sky.css b/css/theme/sky.css
index 32cc4c17326a29c120fc7d37a8d6dac1d709e508..79eaf7fe973404cd1e02a15213ef1d524a9e9e64 100644
--- a/css/theme/sky.css
+++ b/css/theme/sky.css
@@ -1,5 +1,5 @@
-@import url(//fonts.googleapis.com/css?family=Quicksand:400,700,400italic,700italic);
-@import url(//fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700);
+@import url(https://fonts.googleapis.com/css?family=Quicksand:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700);
 /**
  * Sky theme for reveal.js.
  *
@@ -56,11 +56,11 @@ body {
 .reveal a:not(.image) {
   color: #3b759e;
   text-decoration: none;
-  -webkit-transition: color 0.15s ease;
-  -moz-transition: color 0.15s ease;
-  -ms-transition: color 0.15s ease;
-  -o-transition: color 0.15s ease;
-  transition: color 0.15s ease; }
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  -ms-transition: color .15s ease;
+  -o-transition: color .15s ease;
+  transition: color .15s ease; }
 
 .reveal a:not(.image):hover {
   color: #74a7cb;
@@ -79,11 +79,11 @@ body {
   background: rgba(255, 255, 255, 0.12);
   border: 4px solid #333333;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
-  -webkit-transition: all 0.2s linear;
-  -moz-transition: all 0.2s linear;
-  -ms-transition: all 0.2s linear;
-  -o-transition: all 0.2s linear;
-  transition: all 0.2s linear; }
+  -webkit-transition: all .2s linear;
+  -moz-transition: all .2s linear;
+  -ms-transition: all .2s linear;
+  -o-transition: all .2s linear;
+  transition: all .2s linear; }
 
 .reveal a:hover img {
   background: rgba(255, 255, 255, 0.2);
diff --git a/css/theme/solarized.css b/css/theme/solarized.css
index 0534eb37bb739e32732b25041bd55f7dff6d79b9..17c32056e33df29f43853d0a7415b12833a9ca8e 100644
--- a/css/theme/solarized.css
+++ b/css/theme/solarized.css
@@ -1,4 +1,4 @@
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
  * Solarized Light theme for reveal.js.
  * Author: Achim Staebler
@@ -62,11 +62,11 @@ body {
 .reveal a:not(.image) {
   color: #268bd2;
   text-decoration: none;
-  -webkit-transition: color 0.15s ease;
-  -moz-transition: color 0.15s ease;
-  -ms-transition: color 0.15s ease;
-  -o-transition: color 0.15s ease;
-  transition: color 0.15s ease; }
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  -ms-transition: color .15s ease;
+  -o-transition: color .15s ease;
+  transition: color .15s ease; }
 
 .reveal a:not(.image):hover {
   color: #78b9e6;
@@ -85,11 +85,11 @@ body {
   background: rgba(255, 255, 255, 0.12);
   border: 4px solid #657b83;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
-  -webkit-transition: all 0.2s linear;
-  -moz-transition: all 0.2s linear;
-  -ms-transition: all 0.2s linear;
-  -o-transition: all 0.2s linear;
-  transition: all 0.2s linear; }
+  -webkit-transition: all .2s linear;
+  -moz-transition: all .2s linear;
+  -ms-transition: all .2s linear;
+  -o-transition: all .2s linear;
+  transition: all .2s linear; }
 
 .reveal a:hover img {
   background: rgba(255, 255, 255, 0.2);
diff --git a/css/theme/source/beige.scss b/css/theme/source/beige.scss
index 34ff05fda012d90cb931cf04bdec61a1be184b6b..c31956c0f1f5c8c68fc39dd6056fc890d7a4b39d 100644
--- a/css/theme/source/beige.scss
+++ b/css/theme/source/beige.scss
@@ -25,7 +25,7 @@
 	font-style: normal;
 }
 
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 
 // Override theme settings (see ../template/settings.scss)
diff --git a/css/theme/source/default.scss b/css/theme/source/default.scss
index 01e18ce455c8f8f5e9573555506b61caf15b04c6..1117b65c187b9dfcbb90c72b4b9aa6e767213b74 100644
--- a/css/theme/source/default.scss
+++ b/css/theme/source/default.scss
@@ -25,7 +25,7 @@
 	font-style: normal;
 }
 
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 // Override theme settings (see ../template/settings.scss)
 $heading1TextShadow: 0 1px 0 #ccc, 0 2px 0 #c9c9c9, 0 3px 0 #bbb, 0 4px 0 #b9b9b9, 0 5px 0 #aaa, 0 6px 1px rgba(0,0,0,.1), 0 0 5px rgba(0,0,0,.1), 0 1px 3px rgba(0,0,0,.3), 0 3px 5px rgba(0,0,0,.2), 0 5px 10px rgba(0,0,0,.25), 0 20px 20px rgba(0,0,0,.15);
diff --git a/css/theme/source/moon.scss b/css/theme/source/moon.scss
index a885787a9bd04200eb71caf0f237d0a7fd53ba01..a722adc7036d34e5bd0ef435a1b7e6fa5444bee6 100644
--- a/css/theme/source/moon.scss
+++ b/css/theme/source/moon.scss
@@ -24,7 +24,7 @@
 	font-style: normal;
 }
 
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 /**
  * Solarized colors by Ethan Schoonover
diff --git a/css/theme/source/night.scss b/css/theme/source/night.scss
index 0d3219b2eb2ee5ebe592307dde25268363680d88..b0cb57f53f915205db475bd7da107cf2d9b79928 100644
--- a/css/theme/source/night.scss
+++ b/css/theme/source/night.scss
@@ -12,8 +12,8 @@
 
 
 // Include theme-specific fonts
-@import url(//fonts.googleapis.com/css?family=Montserrat:700);
-@import url(//fonts.googleapis.com/css?family=Open+Sans:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Montserrat:700);
+@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic,700italic);
 
 
 // Override theme settings (see ../template/settings.scss)
diff --git a/css/theme/source/simple.scss b/css/theme/source/simple.scss
index 47e5498be826e2114852c184244d5804a3b1de99..84c7d9b0847c8354c20431683ca87f3d495e4280 100644
--- a/css/theme/source/simple.scss
+++ b/css/theme/source/simple.scss
@@ -15,8 +15,8 @@
 
 
 // Include theme-specific fonts
-@import url(//fonts.googleapis.com/css?family=News+Cycle:400,700);
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=News+Cycle:400,700);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 
 // Override theme settings (see ../template/settings.scss)
diff --git a/css/theme/source/sky.scss b/css/theme/source/sky.scss
index 8f59121e07fd5b849778d1f056def878092106fa..f3d7570894059f8a8133f35c1b5937798b03416b 100644
--- a/css/theme/source/sky.scss
+++ b/css/theme/source/sky.scss
@@ -13,8 +13,8 @@
 
 
 // Include theme-specific fonts
-@import url(//fonts.googleapis.com/css?family=Quicksand:400,700,400italic,700italic);
-@import url(//fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700);
+@import url(https://fonts.googleapis.com/css?family=Quicksand:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Open+Sans:400italic,700italic,400,700);
 
 
 // Override theme settings (see ../template/settings.scss)
diff --git a/css/theme/source/solarized.scss b/css/theme/source/solarized.scss
index 4614de2991a637688c43d91f1cb6b3398dc6c94e..8217b8f83c413bf52a001ff30284c58d2c118f48 100644
--- a/css/theme/source/solarized.scss
+++ b/css/theme/source/solarized.scss
@@ -24,7 +24,7 @@
 	font-style: normal;
 }
 
-@import url(//fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 
 
 /**