Corrected bug of preview was stopped when taking a snapshot
corrected pitch inversion in sensorFusionManager hwen gyro is used.
corrected bug : now resume sensorFusionManager when activity resume.
Added SnapshotEventListener to trigger custom event when a snapshot is
taken
corrected bugs : 
-RuntimeException occured when takePicture was called when camera is
busy. Dirty fix with a "if". 
-in CaptureRenderer, Markers with negative pitch where gone. They are
now back
In CaptureRenderer, snapshot3D are placed in real time, at the correct
position.
Corrected aliasing on 3d snapshots