Updated the references between context objects since a DocumentRequest should only be set when rendering
a front-end doc, not in the back office.
Fixes the LookupByNiceUrl to work with non directory paths.
Fixes the UmbracoContext.ClientUrl to work properly.
unit tests for UmbracoModule, refactored the Umbraco.Web.Routing.Domains to not have static methods and created an
interface for it so that we can unit test it. Changed DocumentRequest stuff to internal. Finally got unit test working for the module
