-----------------------
* Bug fix: Speed-up cache invalidation for backward-references
[avoinea refs 95020]
* Feature: replaced invalidate_cache method with a method that use eea.cache
[alecghica refs 95020]
* Feature: "Refresh this page" method redirect you back to the original context
[alecghica refs 95020]
* Feature: cache.settings if called in a context of a default view it will
also invalidate its parent
[alecghica refs 95020]
* Bug fix: fixed case under all invalidate methods when a broken relations
is present and None is found instead of an object
[alecghica refs 95020]