Maintenance release
- Satellite tracker plugin: Fixed memory leaks. PR #979, Fixes #877.
- More memory leak fixes. PR #879: Star tracker, Packet demod, IEEE 802.15.4 modulator, DATV modulator.
- Revision of mutex locks in FIFOs. Fixes #870.
- DAB/DAB+ demod: Use UTF-8 rather than latin encoding for program names. Fixes #874.
- DAB/DAB+ demod: Use latest DAB lib API. Don't write MOT data to files. PR #880