Initial translation to CoffeeScript. Doesn't work yet.
Updated README.
.coffee implementation is now fully functional.
Re-apply changes made in cbc0477ae576cc579f69aeee6421caf4c3d2924c.
Move compiled JS to its own directory.
Add in Segment.io code for analytics.
Merge branch 'coffee' into gh-pages

Conflicts:
	index.html
	js/index.js