Moved getting an IProfile to an extension method, as its not commonly used.
Removing dependencies in ContentService, so the Services and context can be moved to Core proj.
Implementing Template repository to use both filesystem and db.
Adding a UserService, which should be fully implemented in a later release.
Refactoring usage of the ServiceContext, which is now loosely tied to the HttpContext as its used by the UserService.
Refactoring User/Writer on the Content class and interface.
Simplifying events and delegates in the publishing strategy.
