Changes so it builds on OSX, quick hacks, all changes need review before pulling to master.  Powermate needs a proper fix, this was just for testing.

KD0NUZ
Great progress! 8000 samples/second and Codec2 working, no crashes. Modified Powermate defines. Set OSX SAMPLE_RATE_FUDGE to 0 in Audio.h
Uncommented line in Audio.cpp - 8000samples/sec default was crashing QtRadio on startup, that bug was fixed in previous commit.
Cleanup for merge to master
Cleanup for merge to master 2
Cleanup for pulll/merge
Cleanup for pulll/merge
Merge remote-tracking branch 'origin/osx-testing' into ui-testing
Merge branch 'ui-testing' of https://github.com/wmoore/ghpsdr3-alex into ui-testing