Changed invert to naturalSwipe
Removed invert rule from index.html
Ensured that left/right swipes only work with 1 hand present
modified:   index.html
modified:   plugin/leap/leap.js

Added timing code to limit gesture calls.
Added gesture to access the overview.
index.html includes the leap plugin

Left, right, up, and down gestures.
Optional invert for gestures.

Updated README.md

Added "touch" config property

For backward-compatibility, add a new 'fragments' property to the
fragmentshown and fragmenthidden events. The 'fragment' property still
returns the first fragment.

Previously navigatePrev() was changing indexh and indexv; instead should
call slide(h, v) and let it change indexh and indexv.

They looked a little wonky if you used a G or a Y.