an UmbracoHelper property to the PluginController class which will expose any methods needed by devs to retreive media or content.
Have updated UmbracoHelper with loads of new helpful methods and moved the Wrap methods to HtmlHelper extensions because this is purely to
do with rendering html (have written unit tests for it too).
Updated some 'library' methods to proxy calls to UmbracoHelper so we only have to maintain one set of code.
Added a convenience property to UmbracoContext to return the current NiceUrlProvider so you don't have to go through the RoutingContext to get it.
BeginUmbracoForm working for both local and plugin SurfaceControllers. SurfaceController class now inherits from PluginController which exposes all things a dev would
need including making IPublishedContentStore and IPublishedMediaStore public which can be accessed simply by properties on the controller.
Updated web.config for views to include Umbraco.Web namespace for all of our helper methods.
BeginUmbracoForm now has many more overrides for which you can specify a type or a generic type (we no longer require GUIDs :)
Added internal setting for global settings to return an MVC area string based on the umbraco path.
Added a ton of extension methods from v5 that are used in much of the MVC engines.
Added UmbracoHelper methods for MVC rendering including Field so that we can render the correct RTE
field markup when the RTE contains a macro, will add extension methods for the @CurrentPage dynamic object to
do the same to make it consistent.
