First attempt at responding to transition end events... failed!
fixed opening one dialog while closing another with smooth animations
changed to only use scaling transform (to remove z-index vs transform 'z-index' wars)
put all demos in single file
Merge branch 'transition-callbacks' into singleton

Conflicts:
	main-dropdown.ms
	main.js
listening for transition end
legacy fallback
Merge branch 'singleton'
prefixing classes with o-