Feature request: offsets for raw readings

[HeikoRibberink]

Since every Mpu6050 sensor is different, it is necessary to add offsets to the raw readings to calibrate the sensor.

It would be very handy if this crate has a feature for specifying these offsets, and maybe even an example to calculate these offsets, as seen in the IMU_Zero example in the arduino library by ElectronicCats.

If you need help translating the arduino code or creating the feature, let me know!

[HeikoRibberink]

Currently working on a fork for this. I will create a pull request as soon as I have tested my example.

[juliangaal]

Thanks a lot. PR's are more than welcome.

[HeikoRibberink]

PR here