Contribution of pgsql support for AuthenticatorStore and UserService - Compatible with Play! 2.1 version

[akinsella]

pgsql support for AuthenticatorStore provides persistent and clusterisable implementation.
Same for UserService. Pgsql support for UserService is based on Some(implementation) found on Play! mailing list, which was also submitted 3 month ago as a pull request.
SQL scripts are provided. Dependencies on anorm and jdbc are required.

[larvanitis]

I am giving this code a try and I noticed you have some unnecessary/duplicate imports.

Also on PgSqlUserService.scala, you should replace user.passwordInfo.get.password with user.passwordInfo.map(_.password).getOrElse(None) because many social services won't have one and you'll get a null pointer exception