AP_InertialSensor: converted the MPU9250 driver to new API
AP_InertialSensor: converted the APM1/Oilpan driver to new API
AP_InertialSensor: fixes for PX4 driver
AP_InertialSensor: minor tidy up for HIL driver
AP_InertialSensor: improved timing in all drivers
Plane: continue conversion to new AP_InertialSensor API
Copter: convert to new AP_InertialSensor API
AntennaTracker: convert to new AP_InertialSensor API
Rover: convert to new AP_InertialSensor API
AP_InertialSensor: ported L3G4200D driver to new API
AP_InertialSensor: tidy up MPU6000 driver
AP_InertialSensor: use common AP_InertialSensor driver for PX4 and VRBRAIN
AP_InertialSensor: converted flymaple driver to new API
AP_InertialSensor: fix up Flymaple port
AP_InertialSensor: converted MPU9150 driver

untested conversion