Add tests for hiddens on VertexProperty to cover both multi/single property.
Add multiproperty tests for checking StrategyWrappedVertex.
Removed unecessary todo.
Remove unecessary todo.
EdgeOtherStep didn't seem to be working given a strategy test.

The index didn't seem to be calculated right - at least in the test case that was failing.  Not sure if it stands for all cases.  Need to do #75
Need EdgeOtherVertexStep to strategy wrap.
Add test for EdgeOtherVertexStep to cover strategy wrapping.