Changed the way that UmbracoTemplatePage works in that if you pass in an IPublishedContent model instead of a RenderModel,
it will be generated for you without a YSOD. Changed the UmbracoHelper ctor so that it can be passed a custom IPublishedContent model
so that it's context is of that model and not the one routed to. Added Umbraco.Web.Mvc to the imported namespaces for Views.
RenderViewPage to UmbracoTemplatePage which now inherits from UmbracoViewPage. Added NiceUrl and NiceUrlWithDomain as extension
methods to IPublishedContent.
