(cherry picked from commit 067744d0)

(cherry picked from commit fc935184)
Signed-off-by: Andrey Kamaev <andrey.kamaev@itseez.com>

(cherry picked from commit bd12f636)
Signed-off-by: Andrey Kamaev <andrey.kamaev@itseez.com>

(cherry picked from commit cd59cf3a)
Signed-off-by: Andrey Kamaev <andrey.kamaev@itseez.com>

(cherry picked from commit 47b96407)
Signed-off-by: Andrey Kamaev <andrey.kamaev@itseez.com>

* service
* tutorials
* samples
* gitignore

Conflicts:
	modules/gpu/doc/video.rst
	modules/ocl/doc/ocl.rst

ColorBlobDetection Sample, ImageManpulations Sample and Tutorial2 updated. Issues with native camera on Nexus 7 (Android 4.1) fixed.

Android 4.1.1 native camera fix. BufferQueue class is used instaed of Surface texture. Includes in cmake updated.