[User] Implemented login page step
[User] Implemented authentication checking state
Fixed front controllers
Created POC for authentication
Added pseudonym and password to Person
Fixed PHPdoc
Created PersonProvider
Implemented supportsClass
Implemented loadUserByUsername
Implemented refreshUser
Added username not found exception specification
[User] Specifying Credential

Credential is an entity interface the groups together username and
password.
[User] Implementation of Credential
[User] Moved component implementation examples into Fixtures
[User] Inserted credential into Person
[User] Replaced Person by Credential for security
Moved Account classes into Model directory
[User] Created Credential implementation
[User] Implemented SymfonySecurityComponent User