I2C driver for Microinfinity CruizCore XG1300L gyroscope and accelerometer.
This sensor doesn't follow LEGO guidelines and the driver has to be loaded manually.
Added super-awesome command callbacks ;-)
Reimplemented driver for Microinfinity CruizCore XG1300L using commands and modes
Masacred trailing whitespaces
Added footnotes instead of overgrown descriptions
Merge branch 'bmegli' into ev3dev-jessie
More sensor cleanup...

* Simplify mode names. Most mode name now do not include the type of sesnor.
  Sensors with similar funcionallity now generally have the same mode names.
* Added send_cmd_pre_cb function.
* Simplified nxt_i2c_sensor_detect. Eliminates dependency of id_table being
  in the same order as the sensor defs.
* Get rid of unneeded modes in MS_ABSOLUTE_IMU_SENSOR
* Remove UNKNOWN_I2C_SENSOR
* Convert HT_SENSOR_MUX modes to commands
* Clean up some webiste documentation comments
* Shorten `ms-angle-sensor` driver name to `ms-angle`