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.
Adding extension method to ApplicationContext to attach the two contexts here instead.
Refactoring BaseWhereClause as there were problems formatting the sql.
Adding unit tests for MacroRepository and ContentRepository.
