Fix copydir test
Fix copyfile test
Fixed listdir test (few erros were not raised). Creating directories recursively has to take cache in mind.
makedir was still not correct. Has to handle missing parent dirs and invalid resource error
Had to change listdir again so that normal paths and absolute paths are handled the same by dropbox
Meta name read only was handled separatly and returned property that does not exist on object.
Removed Cache as it was implemnted wrong and was the root cause many tests failed. For Cache one can use the CachedFS