tests: added "tests file2" filesystem test

this is useful for testing for filesystem corruption on cluster
boundaries
Added ARDrone to autostart
Added actual ARDrone start up script.
FMUv2: switch debug console and 2nd GPS

this allows a normal GPS cable to be used for the 2nd GPS, making
dual-GPS setups easier
Fixed warning
Merge branch 'master' of github.com:PX4/Firmware
Revert "Fixed warning"

This reverts commit 3639c7ae91f5226b71cdba8d8cc98eae4bba7e07.
Added flag for ARDrone interface.
Set the mavlink port settings back to ttyS1 by default.
Fixed startup parameters.
Added a newline at the end of file.
Get rid of one set of beeps.
mc_att_control: hotfix, memset all structs to zeroes on start, fixes garbage in actuator controls 4..8
Changed ARDRONE to an OUTPUT_MODE setting and added a skip option to mixer. Fewer beeps than before.
ardrone: minor fixes
Merge pull request #705 from helenol/helen_ardrone

Ardrone startup script
fix comparison in rcS
fix if in rc.interface
Merge pull request #709 from PX4/rcs_hotfix

startup scripts hotfix