implementation of imu from drotec.fr

hey there,
here is the implementation of the cheap IMU from drotec.fr with
mpu6050 + hmc5883 + ms5611

i know it is pretty much the aspirin but the mag is different and the I2C addresses are set correctly, 
all in all a lot user friendly  then changing c-files 

to read the MAG:
```<define name="READ_MAG">```