Updated button drawing for animation tests.
Merge branch 'upstream/master'

Conflicts resolved:
	animationTests.html
Merge branch 'upstream/master'
Updated exercise to use hotspots to make sketches clickable.
Merge branch 'upstream/master'
Merge pull request #58 from jvish/review

Review
tweaks for library prototype
object tag prototyping
Merge remote-tracking branch 'upstream/master' into seann
Merge pull request #59 from seannives/seann

Seann
Merge remote-tracking branch 'upstream-master'
Merge remote-tracking branch 'upstream-master'