[MAKE] Upload scetch to v2r if it is realy updated

Use timestamp, Luke!
[BARO] Implement dummy barometer

AP_Baro_None is a dummy implementaion copied from HIL
[HAL_V2R] Separate UART for console/logging output
[HAL_V2R] Bind uartB to /dev/ttyS1
[HAL_V2R] Implement RC input override

RC Input override is used by MAVlink to set RC inputs from GCS
[HAL_V2R] Implement PWM RC output

It's initial implmentation by writing text strings to /dev/v2r_pins.

TODO Use ioctl to mass-update PWM states
[HAL_V2R] Simplify and optimize timer routins

- V2RScheduler::_microsleep just calls usleep()
- V2RScheduler::delay just sleeps if no callback is set
[HAV_V2R] Custom thread names
[V2R] Template for config.mk
[HAL_V2R] Fix guard macro in header
[HAL_V2R] Implement 'UART-over-UDP'

MAVlink connection could be routed to remote UDP server by

ArduCopter -A udp:192.168.1.1:14550
[LIB][MOTORS] Implement test fo individual motor

Press 1-9 to rotate specific motor
[LIB][DATAFLASH] Support V2R in File storage
[COPTER] Add some logging while arming motors
[COPTER][hack] Force 9600 baudrate fot uartB.

Ugly hack to work with GY-GPS6MV2

TODO Read baudrate from params
[COPTER] Hardcode some settings for quad

- Force QUAD_FRAME
- disable CLI
- disable CAMERA
- disable SONAR
[LIB][GPS] Sleep if UART port is not available while updating
[LIB][GPS] Hack NMEA test to work with GY-GPS6MV2

- set 9600 baudrate
- log GPS init start/stop
[LIB][Inertial] Fix compilation warning

AP_InertialSensor::_board_orientation is not intialized
[LIB][INERTIAL] Enable I2C bypass

i2c bypass enables devices connected to MPU6050's slave bus

It is need to work with GY-86