Add todo comment.
Added Subgraph, a wrapper implementation for logical subgraphs based on vertex and/or edge inclusion criteria
Added experimental SubgraphStrategy
Pull script executor down to the gremlin-groovy so that it becomes reusable in other contexts.
Merge remote-tracking branch 'origin/master'
Get subgraph tests working.

StrategyGraphWrapper was not properly being constructed.  Had to change the check for incident vertices when evaluating edges as there was no need to directly evaluate vertex criterion as the graph traversal is amended automatically to do that.
Fixed compile error.
Add some multithreaded tests for GremlinExecutor.
Ensure that the script was eval'd 1000 times.
Add method to get ScriptEngine from the executor.
Fix tab formatting.
SubgraphStrategy tweaks
Merge branch 'master' of github.com:tinkerpop/tinkerpop3
Add javadoc to GremlinExecutor.
Prevent re-wrapping of StrategyWrapped objects.
Created a drop-in replacement for EdgeVertexStep to be used within SubgraphStrategy
Resolved conflict
Add javadoc to GremlinExecutor.
Merge remote-tracking branch 'origin/master'
Tiny, insignificant nothing