Added leap.min.js and comments.
Added gestures

Left, right, up, and down gestures.
Optional invert for gestures.
Updates to leap.js and index.html

Added timing code to limit gesture calls.
Added gesture to access the overview.
index.html includes the leap plugin
Minor updates
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
Removed timing code.
When used correctly, the 1/2 second delay is uncessary and may yield undesireable results.
modified:   plugin/leap/leap.js
Added pointer and tweaked the code
modified:   css/reveal.css
modified:   css/reveal.min.css
modified:   plugin/leap/leap.js
Put the timing code back in.

Occasionally gestures were fired twice. This helps prevent that.
modified:   plugin/leap/leap.js
Minor updates
modified:   css/reveal.min.css
modified:   plugin/leap/leap.js
Docs and updates
Updated README.md to mention the leap plugin.
Removed leap settings from index.html.
Better variable naming in leap.js

modified:   README.md
modified:   index.html
modified:   plugin/leap/leap.js
Various updates

Enhanced the pointer.
Cleaned up the code.
Added additional optional parameters.
Updated documentation.

modified:   README.md
modified:   index.html
modified:   plugin/leap/leap.js
Removed redundant code

modified:   plugin/leap/leap.js
Update index.html

Commented out leap plugin inclusion.
Minor update

Made sure all vars are declared with the var keyword.
	modified:   plugin/leap/leap.js
merge in leap plugin #554