Fixed issue #14 in v4 branch.

Note
I 'reused' ISiteMapNode.HttpMethod property because it seems to replicate DefaultSiteMapProvider.RouteMethod property (that was used to in the fix in the old project) and it is neither documented nor used after setting it in an ISiteMapBuilder.
Normalized conventions used in #178 to be consistent with the rest of the project.
Merge branch 'v4' of github.com:NightOwl888/MvcSiteMapProvider into v4
Removed unnecessary strategy registrations and comment that was causing havoc in SimpleInjector module.