Add ruby version local
Update Gemfile

- Profiler
- Yard
- Rails best practices
Created first Docs
Add simplecov
Add comments analysis controller
Remove karma controller (now model concern)
Change to render nothing
Karma concern updated
Speedtest, comments and refactoring
Refactor models
Change db (public & private profile)
Remove karma controller spec
Update message controller spec
Update userPreference factory
Update user specs