Add Gdn_Request->UrlCompare() to compare two urls for equality.
Fix bug where the home link would display twice in the breadcrumbs.
Merge branch 'hotfix/breadcrumbs-homelink' into stage

Conflicts:
	library/core/class.request.php
Add the current locale to the smarty variables so that themes can take advantage of it.
Make the category lookup by url code case insensitive.
Merge branch 'hotfix/case-insensitve-category-slugs' of github.com:vanilla/vanilla into stage
Merge branch 'feature/locale-to-smarty' of github.com:vanilla/vanilla into stage