[Upgrade] All code has been rewritten to use the new services and models of umbraco v6.1
[BugFix] URL changes are tracked again (#9)
[BugFix] 410 Gone response now gets lower priority than other response codes
[Improvement] Improved performance, removed hitting the DB for every single request, added caching instead
[Dropped] Dropped support for pre-6.1 umbraco versions