added test stubs (#13)
implemented tests (#13)
implemented deleteMatchingStatements() (#13)
reduced model deletion to usage of deleteMatchingStatements() (#13)
added Symfony configuration component (#13)
added configuration class stub (#13)
created configuration definition (#13)
changed factory to setup infrastructure automatically (if configured) (#13)
added test stubs (#13)
added comments and helper method (#13)
implemented tests (#13)
fixed handling of port number in string format (#13)
added test for port number validation (#13)