PX4: update FMUv1 bootloader to use USBID 0x10
DataFlash: zero-fill FMT packet before logging

this prevents uninitialised data appearing at the end of strings in
logs
Rover: ensure fly_forward is set in AUTO
Git: ignore eclipse project files
Copter: Split out prearm failures of low HDOP separately from !gps lock

(on the iris list there was some confusion on why the copter was blinking
yellow but yet they had gps lock)
Iris: Add Pitch Settings for gimbal
Remove unused .project file

This is apparently a eclipse .project file but it is not maintained
Merge branch 'master' of https://github.com/diydrones/ardupilot into individual_motors_test