Prevent flips at high throttle

Conflicts:
	src/drivers/ardrone_interface/ardrone_motor_control.c
Merge pull request #304 from julianoes/ardrone_fixes

Prevent flips at high throttle
Fix UART buf sizes so that MAVLink transfers are not corrupted for all serial ports intended for MAVLink
Reset baudrate after px4io update
Merge pull request #375 from julianoes/hotfix_px4io_uart

Reset baudrate after px4io update
Hotfix: Identified mavlink issue source, workaround, working on a fix