FaceRecognizer extension, opencv detector data files

Conflicts:
	web/api/controllers/CVController.js
	web/assets/images/sample/mona.png
WIP face recognition module
WIP
Saving state for working detection, WIP recognition
working face recognition with att facedb. WIP: build custom facedb.
minor changes to cv controller
WIP: detection crop, resize, recognition
Merge remote-tracking branch 'origin/facerec-v2' into develop