[FaceDetection] update of detection

Detection should be more robust and take less computing time
[FaceDetection] Added formula for average position

TODO: Need to reimplement the computing of eye coordinates in each frame
when face is detected
[FaceDetection] removed cycle to compute average
[FaceDetecton] fix & emit

fixed pop/push.
removed condition for eyes coordinates emit
[FaceDetection] Removed unnecessary object/include

FaceRecognizer object call/desctucted form within run method of
recognition thread.
Object deleted from OpenCVCore & removed unused include.
[FaceDetection] added parameter for lifo size

#define LIFOSIZE
Merge branch 'features-HeadCameraMovementUpdate-Marek' of https://github.com/marconak/Arvis into develop