add function interface in photoeffects.hpp
Add function fadeColor in photoeffects.cpp
Add test
correct name of function
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)
Merge pull request #9 from stragger/glow_implementation

Add glow implementation
Add Boost Color implementation
Added boost_color.cpp
Add test
Edit test
Merge pull request #10 from stragger/boost_color_implementation

Boost color implementation
Add prototype of antique effect.
Solve problem with include.
Fixed one more misprint.
Another misprint fixed.
Add test for antique effect
Merge pull request #13 from VadimLevin/antique_implementation

Trying pull-request. Added prototype of antique effect.
Interface of sepia function was modificated.
Merge master with branch.