Add README

README.md

+# Angel Guide for Chaos Events
+
+## Requirements
+* asciidoctor
+* asciidoctor-pdf
+
+## How to build the PDF
+
+We need to specify asset and fonts directories to build the guide properly.
+
+e.g. for the camp2019
+
+```
+  $ asciidoctor-pdf -a pdf-theme=asset/camp2019/theme.yml -a pdf-fontsdir=asset/camp2019/fonts index.adoc
+```