Uas checks

NMEA library and all references to NMEA have been removed.

fixed waypoints with APM

as long as the waypoint comes from the right systemID there is no
point rejecting it based on component ID. 

The current_partner_compid is also completely wrong in the code, so
checking it makes no sense anyway

Replaced the autopilot-specific inclusion of MAVLink to be more generic

Unittesting fix

Datalogger refactoring

I had to update some method calls in UASUnitTest.cc. I'd bet that some of the tests are wrong now because of it.

TODO: This should be altered to reuse stuff from qgroundcontrol.pro by including it instead of copy/paste.

Refactored the LogCompressor. It wasn't properly handling certain message logging files that mixed messages (Issue #70).
One note is that this logger should work correctly as I've tested it, but could have some edge cases. It is pickier about the file format that it will sparse, but I don't know if the error-checking stuff from the old code would have actually worked. This can also be easily re-added.

This code is also much faster than the old stuff. From what I could tell it scanned through the log file at least twice, I think three times. It also copied a lot of data into memory instead of reading, processing, and writing one line at a time, so memory use should be much lower. Some memory leaks from the old code were also refactored out, so lifetime memory use should be down.