Added support for DX10t, which apparently outputs 13 channels
Fix copyright, do not return junk channel #13 that Spektrum gives us.
Merge pull request #684 from PX4/dsm_fix

Dsm support for DX10t
Change bit mask to allow for 10 channels.
Fix mavlink feedback FD handling
Code style
Fix DSM pairing error handling.
Merge pull request #685 from PX4/dsm_pairing_fix

DSM pairing fix
Scaling Spektrum inputs into normalized value same as the servo outputs do
Added int cast to handle arithmetic correctly
Merge branch 'master' of github.com:PX4/Firmware into beta