add function interface in photoeffects.hpp
Add function fadeColor in photoeffects.cpp
Add test
Edit files for Film Glain
correct error in .hpp
correct name of function
add a new version of the files.Film Grain
add a new version of the files.Fade Color
Empty emplementation of the fade color  filter (src/fadeColor.cpp) and fake test (test/fadeColor_test.cpp)
Empty emplementation of the Film Grain filter (src/filmGrain.cpp) and fake test (test/filmGrain_test.cpp)
tint_implementation
Merge pull request #11 from KruchDmitriy/Tint_Implementation

dummy tint implementation
Add glow implementation
Edited merge conflicts, added glow.cpp
Del glow implementation from sepia.cpp
Add tests for glow implementation
Merge pull request #9 from stragger/glow_implementation

Add glow implementation
Add Boost Color implementation
Added boost_color.cpp
Add test