GPS: need to include NAV-STATUS message
GPS: display if a differential fix is acquired
Flight: treat Diff3D like Fix3D

Since this is simply a better quality lock.
GPS: add power on delay for configuration

Wait a second to send the configuration info,
to make sure the power is stabilized etc.
UBX Cfg: parse stream while configuring

This can allow us to monitor the responses to queries
UBX: parse the MON-VER message

This allows us to query the GPS version attached.
UBX CFG: fix polling the MON-VER

Forgot to send the length parameter.
UBX CFG: send version specific configuration

According to Bill Nessbit the v7 GPS have a problem
with SBAS so this is disabled in this case.
UBloxInfo: add object for holding gps version info
UBX CFG: cleanup
UBX CFG: clean up fetching version info