Fixed the sample in "Using Where with Match"
Fixes #407
Merge pull request #410 from dkuppitz/check-docs

Fixed the sample in "Using Where with Match"
Renamed "iterator" related methods in the `GraphStrategy` interface #400

The are now consistent with the method names they represent.
Improved error messaging when importing "legacy" GraphSON #404

Legacy graphson needs to be generated with "extended" properties. Messaging is now clear that this is required.
Transaction retry functions now work with "manual" transactions. #405
Updated VertexTest to use Graph.iterators() #398