Remove gdx-ai from core repo
fixed PolygonRegionLoader GWT compatibility and error report

removed call to Class#getSimpleName() for GWT compatibility
throws GdxRuntimeException instead of logging to Gdx.app.error(..)
Added stencil buffer to FrameBuffer.
Added matching constructor to existing code.
Add Usage#ColorUnpacked, deprecate Usage#Color.
Merge branch 'master' of github.com:libgdx/libgdx
Added a test for stenciled framebuffer.
Removed unneccesary changes.
Removed unneccesary matrix and added a comment what should be seen.
IOSMusic.play() now doesn't restart if called while playing.
This is the same behavior as in all other backends.
Hash attribute type by the number of trailing zeros instead of casting long to int
Wrong package exclusion on gdx-tools assembly
Merge pull request #2354 from Arcnor/master

Wrong package exclusion on gdx-tools assembly
Merge pull request #2353 from BlueRiverInteractive/ios-music-play-fix

IOSMusic.play() shouldn't restart if called while playing
Use UTF-8 for Hiero settings

Closes #2308
Merge pull request #2328 from dermetfan/master

fixed PolygonRegionLoader GWT compatibility and error report
Merge pull request #2338 from ollipekka/master

FrameBuffer to include stencil attachment
Merge pull request #2336 from xoppa/various

Add Usage.ColorUnpacked, deprecate Usage.Color.
Merge pull request #2312 from Tom-Ski/master

Remove gdx-ai from core repo