Implement material attribute hashcode
Merge pull request #1975 from xoppa/various

Implement material attribute hashcode
Added a FreeTypeFontGeneratorLoader.
Added JavaDoc for the loader.
Added a 3D benchmark test and benchmarking utilities.
The test also intercepts Gdx.gl now.
Measure useProgram instead of attachShader
Replaced all internal uses of Gdx.graphics.gl20() with Gdx.gl20
Merge pull request #1978 from nooone/glreplace

Replaced all internal uses of Gdx.graphics.gl20() with Gdx.gl20
Merge pull request #1976 from nooone/freetypeloader

Added a FreeTypeFontGeneratorLoader
Merge pull request #1973 from witnessmenow/master

Adding Kindle Fire TV controller mapper file and updating the Ouya mapper file
Created an equals method for the rectangle object.
Adding proper hash code method to Rectangle so that the equals method functions appropriately.
Improving equals to by using Float.floatToIntBits
Renamed GLBenchmark to GLProfiler.
Cleaning up JavaDoc comments.

As to follow the file's javadoc style (see toString above), I remove the @Override marker.
Made SelectBox account for list background size

Addresses issue #1982
Add support for 'rotation' property
Removed ProfilingModelBatch. Added static helpers to GLProfiler. Added primitive counter to GLProfiler.
Fix TextureUnpacker