this gives us more control over all Resolvers and streamlines them. Created IBootManager, CoreBootManager and WebBootManager
to handle the application initialization including the creation of Resolvers. This means that if people are using the dlls outside
of the web app, they can run the boot strappers to initialize everything.
Have removed ResolverBase as we cannot rely on manually setting the current singleton object since applications outside of the standard umbraco web application
might be using these singletons and would expect they already be setup. Have changed all current resolvers to manage their
own singleton instances and sealed them.
and are just adding the known resolvers on app startup and commented out the other resolver stuff for now.
Fixed up xpath statement for resolving the first document, site now renders :)
