Minor PEP8 whitespace fixes in bridgedb.Bridges.BridgeRing.setName().
Add docstring for bridgedb.Bridges.BridgeRing.__len__().
Add docstring for bridgedb.Bridges.BridgeRing.clear().
Add docstring for bridgedb.Bridges.BridgeRing.insert().
Minor PEP8 whitespace fix in bridgedb.Bridges.BridgeRing.insert().
Add docstring for bridgedb.Bridges.BridgeRing._getBridgeKeysAt().
Add docstring for bridgedb.Bridges.BridgeRing.getBridges().
Minor PEP8 whitespace fix in bridgedb.Bridges.BridgeRing.getBridges().
Update/add docstrings for bridgedb.Bridges.FilteredBridgeSplitter.