044 A:
- add choice between absolute and proportional RC positioning
- add continious angle output for debugging/GUI purposes
- add choice between raw ACC and DMP for Horizont stabilization
  (DMP is experimental for now, PIDs have to be changed/lowered)
  (Default is ACC)
- Serial Protocol:
WE    (Writes active config to eeprom)
RE    (Restores values from eeprom to active config)
TC    (transmits all config values in eeprom save order)
SD    (Set Defaults)
SP gyroPitchKp gyroPitchKi gyroPitchKd    (Set PID for Pitch)
SR gyroRollKp gyroRollKi gyroRollKd    (Set PID for Roll)
SA accelWeight    (Set Weight in accelWeight/1000)
SF nPolesMotorPitch nPolesMotorRoll
SE maxPWMmotorPitch maxPWMmotorRoll     (Used for Power limitiation on each motor 255=high, 1=low)
SM dirMotorPitch dirMotorRoll motorNumberPitch motorNumberRoll
GC    (Recalibrates the Gyro Offsets)
TRC   (transmitts RC Config)
SRC minRCPitch maxRCPitch minRCRoll maxRCRoll (angles -90..90)
SCA rcAbsolute (1 = true, RC control is absolute; 0 = false, RC control is proportional)
TCA   (Transmit RC control absolute or not)
UAC useACC (1 = true, ACC; 0 = false, DMP)
TAC   (Transmit ACC status)
OAC accOutput (Toggle Angle output in ACC mode: 1 = true, 0 = false)
ODM dmpOutput  (Toggle Angle output in DMP mode: 1 = true, 0 = false)
HE    (This output)