Update README.md

Add a link to documentation
Sepia filter implementation and sample.
Modified documentation.
File with the sample for sepia filter.
Check input image.
Parameters (hue, saturation, value) were removed.
Tests for sepia filter were written.
Replace tabs with whitespaces.
Test was modified.
Test was modified.
Test was removed.
Test was restored, interval [<v>-1,<v>+1] was set for hue, saturation and value.
Matrix initialization in the test for sepia effect.
Merge pull request #23 from valentina-kustikova/sepia_impl

Sepia implementation and sample
Fix sepia documentation
Merge pull request #24 from druzhkov-paul/sepia_documentation_fix

Sepia documentation fix
edit glow sample, edit CMakeLists
Add boost color imlementation and sample
Edit boost color implementation, change way to convert to HSL
Revert "edit glow sample, edit CMakeLists"

This reverts commit b1b66171d277eaa96ab91e2ffa4a26919cbf4b5b.