Throw useful error if IAuthRepository is not registered
Added check for initialized OrmLiteAuthRepository and error with suggestion.
Merge branch 'master' of https://github.com/ServiceStack/ServiceStack into registration-improved-errors
Merge branch 'master' of https://github.com/ServiceStack/ServiceStack into registration-improved-errors
Merge pull request #948 from Layoric/registration-improved-errors

Registration improved errors