Added sanity data for RGB to YUV420p color converison
removed obsolete demos & data
refactoring
refactored CMake scripts, switched to CPack
added denoising demo
split data between demos
convert videos to x264 and images to Jpeg
deleted performace demo
refactoring
added INSTALL_OPENCV_LIBS and INSTALL_CUDA_LIBS options
Merge branch 'cvtRGB2YUV420p' of git://github.com/Daniil-Osokin/opencv_extra into 2.4
Merge pull request #30 from jet47:new-gpu-demos-pack into 2.4