Unit test for ColorTracker

Found a bug while writing the unit test, so fixed it as well here.
Unit tests for Brief
Updates Brief tests
Lint
Removes tracking.one calls from examples
Source formatting

Signed-off-by: Henrique Vicente <henriquevicente@gmail.com>
Adding the docs generator

Signed-off-by: Henrique Vicente <henriquevicente@gmail.com>
Source formatting
Adds tag friends example