Using Bintray's JCenter.
- added GPUImageHalftoneFilter (by @ryohey)
- added GPUImageTransformFilter (by @jonan)
- fixed GPUImageChromaKeyBlendFilter (by @badjano)
- fixed GPUImageLookupFilter (by @jonan)
- added GPUImageBilateralFilter (by @wysaid)
- added flip options to
GPUImage#setRotation
- added GPUImageLevelsFilter (by @vashisthg)