Merge pull request #2461 from Schorti/master

Remove blanks in Czech language
#2347: fix bad attribute mapping
#2441: cache owner information for OC
Fix #2441, Owner information not shown for OC.de caches

Extended oc connector to return owner state as well
Fix #2348, Cache description is missing for OC0537

Added failing testcase and fixed modifiedsince in query-string
fixes #2436 - new colletion type needs remove on old cache instance
Merge pull request #2470 from marco-jacob/updateMapIcons

fixes #2436 - new colletion type needs remove on old cache instance