Making DOM events work for me.

Hello Dan,

I'm new to web development, so please pardon me if I am "doing it wrong." I was unable to get DOM events to work properly with hexaflip so, after applying some crude debugging techniques, I found the issue to be that the hexaflip javascript (and correspondingly, the coffee script) named the variable carrying the DOM events 'domEvents' rather than 'events' as defined in the example. I edited the javascript to fix the issue for me; I figured I would try make changes to your coffee script and example text as well to try to contribute something useful back to the project. Note that I didn't test all of these changes; I just made them quickly so that the code base would be consistent for this pull request.

If you have any questions just let me know. Again -- I could be doing this wrong, so if you discard these changes no sweat.

Regardless, thanks for making all these cool, open source visualization tools.

Jon