Inline implementation of the SensorEventListener
Add accelerometer sensor
Add overshoot filter and rewrite sensor calculation

In getRoll and getPitch in GyroscopeController add an overshoot
calculation. It split the overshooted sensor values.

Rewrite the ratio of the accelerometer sensor's value
Remove the support of RotationVector sensor
Code cleaning with Se.Ev.List. re implemntation

Implement again the SensorEventListener direct on
GyroscopeController class.
Add normalization to the accelerometer
Merge branch 'pull_accelerometer' into gyroscope

Conflicts:
	src/se/bitcraze/crazyfliecontrol/controller/GyroscopeController.java
Merge branch 'gyroscope' into hover_mode