add fadeColor function and sample
add changes based on comments
corret CMake files to compile fadeColor_sample
Merge branch
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
New interface for glow function
Test implementation for glow filter
Edit glow implementation
Add glow sample
edit glow sample, edit CMakeLists