Edit files for Film Glain
correct error in .hpp
add a new version of the files.Film Grain
Empty emplementation of the Film Grain filter (src/filmGrain.cpp) and fake test (test/filmGrain_test.cpp)
merge branch with master
add new interface for filmGrain function
edit test, add new interface for filmGrain function
Merge pull request #16 from DolotovEvgeniy/FadeColor-implementation

Fade color implementation
merge FilmGrain-implementation branch with master
Merge pull request #6 from DolotovEvgeniy/FilmGrain-implementation

Film grain implementation