[FEATURE] Filter for owned items
[FIX] Fix tests
[FEATURE] Unitest for filter owned
[FIX] Fix owned items test
[FEATURE] Delete to cache manager
Models for language done.
[FEATURE] Iterable cache manager.
[FEATURE] Locale filter
[CHANGE] Change in user models
[FEATURE] Finished unitest for language filter. Still a bug in cache.
[FIX] Fix language cache