fw_att_control: airspeed is now used correctly
fw_att_control: delete the unused flag
fw_att_control: proper struct initialization
fw_att_control: whitespace only
fw att control: add timestamp dependency in airspeed check
fw att ctrl: airspeed check: remove unnecessary cast
sensors app: add timestamp in airspeed message
Merge pull request #719 from PX4/hotfix_fw_airspeed

fw_att_control: airspeed is now used correctly