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.
Adds MediaRepository implementation U4-957
Refactoring ContentType and MediaType to have parent id as constructor dependency.
Refactoring PropertyFactory to work for both Content and Media.
Adding Version property to Media.
Hiding language property untill its fully implemented.
Making set on Parent Id private.
Resolves a naming conflict in DocumentExtensions and DefaultPublishedMediaStore.
Adds interfaces for IContentTypeBase, IContentTypeComposition, IContentType and IMediaType.
This includes the inheritance structure for Content and Media, as well as ContentType and MediaType which is basically the same except for Templates and Compositions.
