Keras-maskrcnn

Changes since last release:

- Float16 support.
- Generators are implemented as Keras `Sequence`.
- Allow batch_size > 1.
- Bug fix for how overlaps are computed.

Changes since last release

- Add mask drawing tools
- Add Travis testing
- Python2 compatibility
- Add evaluation
- Add class specific filtering
- Allow multiple ROI submodels
- Add config parsing for anchor shapes
- Reduce memory usage

Initial release.