mavlink/qgroundcontrol — pull request #695 by Susurrus (2014-06-10 19:46:06+00:00)
Title: Refactored QGC::groundTime*() functions to be simpler.

I don't see a reason to do all of this DateTime work, when `QDateTime::currentMSecsSinceEpoch()` should do it all for us. Also now documented that `groundTimeUsecs()` only has millisecond precision.