Starting development of 0.5.3
Add key listener for "anykey"
Add Observable mixin class
Add Observable mixin class
Update to YUI 3.9
Improve Observable
Improve camera documentation
Improve Observable documentation
Add simple support for 'oldschool' events
Change context listener into event
Migrate code to Observer pattern
Migrate shaderListener to Observer pattern
Migrate Material.addShaderChangeListener to Observer pattern
Migrate Material.addShaderChangeListener to Observer pattern
Refactored ComponentChangedListener into Observer pattern (Observable)
Updated release notes
Simplify Scene.createDefault (remove engine parameter)
Skybox
Make skybox support context lost
FPSWalker - support changing camera components