move headless to its own backend
mock elements
build.xml for headless backend
add headless GraphicsType
Merge remote-tracking branch 'upstream' into headless
give delta time for headless graphics
move package declaration
Reduced unneeded net classes
add isUnit and isZero to Vector2 (based on Vector3)
use xoppa's idea as per PR discussion
added isDrawing()
Release audio in LwjglCanvas
And fix small typo.
Merge pull request #1233 from mariusk/master

Working iOS builds support
Revert 1217, don't require reflection when using Array.

Kept the "of" methods at least.
HashSet in TextureAtlas changed to ObjectSet.
Merge pull request #1231 from anserran/audiorelease

Release audio in LwjglCanvas
Merge pull request #1225 from Phibedy/patch-14

added isDrawing()
Merge pull request #1206 from jrenner/vector

add isUnit and isZero to Vector2 (based on Vector3)
Merge pull request #1203 from Unkn0wn0ne/net

Removed Gdx.net Server and ServerSocket duplication.
Merge pull request #1166 from jrenner/headless

Headless (new backend, mocked)
Added copy constructors.

Untested, yay! :D
closes #1236