Leapmotion plugin

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

Commented out leap plugin inclusion.

modified:   plugin/leap/leap.js

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

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

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

modified:   css/reveal.min.css
modified:   plugin/leap/leap.js

Occasionally gestures were fired twice. This helps prevent that.
modified:   plugin/leap/leap.js