Start from a copy of MPU6050 folder.
Add magnetometer capabilities (MPU-9150).
WIP: Rename files MPU6050 -> MPU9150.
Automatic sed substitute: MPU9150 -> MPU6050.
Remove 6 axis related files.
Merge pull request #58 from honnet/MPU9150

Add MPU9150 folder: MP6050 with magnetometer (but without anymore file MP6050 related)