Merge pull request #4506 from owncloud/oc_avatars

config/config.sample.php

core/avatar/controller.php

core/css/styles.css

core/js/avatar.js

core/js/jquery.avatar.js

core/routes.php

core/templates/layout.user.php

lib/avatar.php

lib/base.php

lib/installer.php

lib/notsquareexception.php

lib/templatelayout.php

settings/css/settings.css

settings/js/personal.js

settings/personal.php

settings/templates/personal.php

settings/templates/users.php

settings/users.php

tests/data/testavatar.png

tests/lib/avatar.php