Add VertexFeatures.removeVertices.
Merge remote-tracking branch 'origin/master'
added BranchStep but its not tied in. Updated AbstractStep so that if the Traverser from processNextStart() has a bulk of 0, it is not propagated. Added a completeRound() boolean helper method to FunctionRing. Added EmptyTraverser which is a bulk(0) traverser used by steps wanting to return 'nothing' from their processNsxtStart().
Add features for Element supports property removal.
Merge remote-tracking branch 'origin/master'
Remove some unused exceptions.
Remove todos.  This can't be done without #199.
toString is smart about the property value lenght. Fixed #222
Soften failure parameters for graph generator tests #162
Make the graph strategy toString methods consistent. #181
Fix busted test given toString change with Graph Strategy.
minor fix to the reset() method of RangeStep.
Temporarily ignore test.
Merge remote-tracking branch 'origin/master'
more work on BranchStep. Fixed @spmallette toString() issue with SequenceGraphStrategyTest. @spmallette. you might want to make sure what I did was kosher.
Remove todo and ignore on sequence graph test.
Get toString tests for strategy wrappers to pass.
Move toString consistency tests for StrategyWRappedGraph to the appropriate place.
Centralize GraphStrategy toString op to StringFactory.
Better assert toString on GraphStrategy.