Virtualflybar: fix double promotion
Telemetry: fix double promotion
Virtualflybar: fix double promotion
Stabilization: fix double promotion
GPS: fix double promotion
TransmitterControl: fix double promotion
TxPID: fix double promotion
VtolPathFollower: fix double promotion
FixedWingPathFollower: fix double promotion
WorldMagModel: fix double promotion
CameraStab: fix double promotion
PathPlanner: fix double promotion
Paths: fix double promotion
Attitude: fix double promotion
VibrationAnalysis: fix double promotion
CMSIS3 DSP: fix double promotion
Targets: enable -Wdouble-promotion

This provides a warning (error) whenever a double is used in math
assigned to a float which should not be done.
Rfm22b: fix double promotion
PyMite: fix double promotion
CopterControl: enable -Wdouble-promotions