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.
