Calib3d badarg tests fixed. Default exception handling enabled;
Highgui Video I/O tests fixed on ARM;
Code cleanup.

Windows RT sample cleanup.
Video I/O code cleanup.

Bug in Video for Windows capture init fixed;
Media Foundation based capture finalization fixed;
Highgui tests for video i/o updated.

Video i/o tests enabled for media foundation;
Negative stride support added to VideoCapture;
Error handling improved, dead lock in case of playback error fixed;
Some code refacotring done.

I* + SafeRelease -> ComPtr.

Camera-based VideoCapture updated to fit changes in ImageGrabber from prev
commit

Set and Get methods are not implemented;
Camera based video capture is broken due to modifications.

FourCC parameter handlig added;
Smart pointers instead SafeRelease call;
Windows RT support (vertical mirroring).

Code formating fixed;
GrabFrame method implemented correclty.