Found via `codespell -q 3 -I ../opencv-whitelist.txt --skip="./3rdparty"`

- CV_RGB() macro is moved into opencv2/imgproc.hpp from imgproc_c.h
- samples/cpp/filestorage_base64.cpp is dropped

Found via `codespell -q 3 --skip="./3rdparty" -I ../opencv-whitelist.txt`

Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

of WINRT samples

This removes requirement to add OPENCV_WINRT_INSTALL_DIR with backslash in the end

in case trailing slash is presented VS handles duplicated slashes w/o issues

Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

 - Made use imread() in OcvImageProcessing sample.
 - Added test/sample logic to verify file creation via imgcodecs.
Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

Signed-off-by: Maxim Kostin <v-maxkos@microsoft.com>

Also removed malformed tEXt chunk from a logo PNG.

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

Corrent histogram output on YUV image implemented;
Some code refactoring done.

Gistogram output does not work propertly due color conversion problems.

Unused scenarious removed.
Grey scale convertion replaced with cv::Canny call.

Microsoft Media Foundation Camera Sample for Windows RT added.