add fadeColor function and sample
add changes based on comments
corret CMake files to compile fadeColor_sample
add implementation of function
Merge branch
Merge branch 'master' into FilmGrain-implementation
add documentation
add documentation
attempt to improve
attempt to improve
attempt to improve
attempt to improve
attempt to improve
attempt to improve
add new test
attept to improve
attempt to improve
Merge branch 'master' into FadeColor-implementation
Merge branch 'master' into FilmGrain-implementation
add film grain implementation and sample