Regression test for sepia filter.
Merge pull request #70 from valentina-kustikova/sepia_reg_test

Regression test for sepia filter, resolve #59
attempt to improve
add new parameter: seed
Merge branch 'master' into FilmGrain-documentation
add new parameter: RNG&
add parallel version
Some modifications.
Merge pull request #75 from DolotovEvgeniy/FadeColor-optimization

Fade color optimization
Merge pull request #71 from DolotovEvgeniy/FilmGrain-documentation

Film grain documentation
warmify.cpp was correct
file wasn't changed
warmify.cpp was be changed
warmify.cpp changed by using OpenCV methods