[update] connect sendEyesCoords signal to setRotationHead slot

Add connect sendEyesCoords signal to setRotationHead in faceRecognizer
constructor.

DONE:
- Add base class QObject to class CameraManipulator and macro Q_OBJECT.
  CameraManipulator must inheritate from QObject to provide slots.
- Modified CmakeLists because - add CameraManipulator.h to list of files,
  where Q_OBJECT is used.
TO DO:
- start emit from FaceRecognitionThread
- repair sending eyes coord to another type
- _rotationHead has still no effect
[update]  change eyeCoord back to percantage format

Change eyes coordinates back to percentage format multiplying by 100,
because of problem in sending signal, where float were roundet.

TO DO:
- change float to int(backt to Point2i) or repair to senfing signals
to not rounding, maybe by adding metatype.
[CameraManipulator] edit getMatrix(), getInverseMatrix() - use _rotationHead, emit eyes coords

DONE:
- Start using _rotationHead. Edit methods getMatrix(), getInverseMatrix,
  where result matrix are compute form _rotation multiplied by
  _rotationHead since now. It affect camera position.
- Start emit signal sendEyesCoords()
- Eyes coord are inversed multiplaing by -1 to correct them
- It is firt protopyt, where camera is affected by face position.