Integrate HTML5 canvas rendering into js client.
Cleanup files from canvas rendering experimentation.
Dynamic rendering now colors the result raster.

However, the extra work definitely slows down the animation.
Fix dynamic rendering image "flicker" issue when changing zoom level.

Tiles now only trigger loaded events once the initial filtering takes
place, preventing the issue where a strange image would flicker visible
after zoom.
Merge branch 'master' of https://github.com/geotrellis/geotrellis-transit into newmaster

Conflicts:
	src/main/resources/webapp/js/application.js
Fix bug in pull request merge.
Replace "mode" with "modes".
Use requestAnimationDelay for animation optimization.
Unload animation on layer removal.
Merge pull request #34 from joshmarcus/topic/html5_rendering

Add dynamic HTML5 canvas rendering option to client.