Only handle buttons with an object.
CPU sync false by default.
added CHANGES file, every contributor should add a quick note on what she changed if it breaks the API or adds a new API
updated CHANGES
Updated temp vector stuff in scene2d to meet Nate's obsessive compulsive standards.

Comments shouldn't list where something is used, as it too easily becomes obsolete, and it is obvious these are "scratch" objects. :)
Merge remote-tracking branch 'origin/master'
JSON texture packer stuff was not supposed to be committed!
List now only fires ChangeEvent on change.
Merge pull request #299 from Getterac7/list-change-fix

List now only fires ChangeEvent on change.
Update README.md
Update README.md
Merge remote-tracking branch 'remotes/upstream/master'

Conflicts:
	README.md
	gdx/src/com/badlogic/gdx/scenes/scene2d/ui/Window.java