added authentication entry point
added tests
added 401 to ajax requests
inserted spaces after colons
Merge pull request #90 from sulu-cmf/feature/authentication-handling

[FEATURE] added authentication entry point
added hidden response for password entrance in command
Merge pull request #91 from sulu-cmf/enhancement/create-user-command

Improved user command
Merge branch 'develop' of git://github.com/sulu-cmf/SuluSecurityBundle into feature/extend-user-entity