adding in some actual demos. Modals 2 isn't quite right yet.
Merge pull request #20 from chriscoyier/master

Adding modal demos (not quite done)
unprefixing keyframes to fix firefox
Merge pull request #21 from chriscoyier/master

fix firefox thing, unprefixing in keyframe
adding buttons
grunt
Merge pull request #25 from chriscoyier/master

adding buttons in a half-done kinda way