0.1.1: Expose additional interfaces in LimitedStore

Previously if a DataStore would be embedded as a TerminaterDataStore inside
a LimitedStore. This makes additional interfaces, such as GetReaderDataStore,
inaccessible since we are not able to cast a LimitedStore to
GetReaderDataStore. The solution was to manually expose the specific methods
although this is definitly not the nicest solution.