Created separate class that will contain additional tests.
Added integration tests for creating and matching a user based on OpenIDUserInfo,
Finished integration tests.
Merge remote-tracking branch 'upstream/master'
Updated user service test to use IUserService.
Updated UserService and tests.
Fixed problem with UserService.
Sorted usings.
Merge pull request #57 from jorisvervuurt/master

More tests; updated UserService and interface.