Windows RT sample updated.

Unused scenarious removed.
Grey scale convertion replaced with cv::Canny call.
Several transforms added to sample IMFTransform.
Transform selection implemented in sample GUI.

Gistogram output does not work propertly due color conversion problems.
Windows RT sample improved.

Corrent histogram output on YUV image implemented;
Some code refactoring done.
WinRT build fix for samples and static libs.
Windows RT related code cleanup.

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