Remote servo control

Servo manager is on the UART1 (57600 baud, 8bit, 1stop, no parity)

Message:
    s|number|value

number - from 1 to 5
value - from 0x0A to 0xDF (servo safety and 180 degrees rotation)

Signed-off-by: Maslov Nikita <wkernelteam@gmail.ru>