Restarting work on avatar service
Creating twig extension to build avatar image URL
Minor tweaks to code style
Improving docblock comments
Fixing previous commit - should expect a string class name, not instance of a class
Adding unit testing to user bundle - for avatar image URLs
Fixing twig avatar extension to match PSR-2 specification for use declarations
Slight refactoring of avatar service tests
Merge branch 'feature/avatar-service' into development
Updating docblocks to fix PHP_CS
Merge branch 'feature/avatar-service' into development