Support UTC time base for event logging
Bug fix for PPP backward solutions
Fix bug in post-processing half-cycle corrections
Add support for post-processing half-cycle corrections for u-blox receivers
Fix compile errors for QT apps (still not fully supported)
Fix GLONASS dual-freq ionospheric correction bug
Merge pull requests #120, #121, #137, #138
Improvements for moving base RTK solutions
Add support for new Beidou codes for RTCM3 MSM messages
Change third frequency for Beidou from B2A to B3
Don't discard RTCM3 MSM end-of-epoch flag if message data is invalid but message header is valid
Updates to sample config files