spruced up the PROFILE calls. Changed the Graph.System prefix to ^ instead of %&% as it will now be a serious thing for TP. Everything EXCEPT VertexProgram property keys are now Graph.System. This way, there is no bleeding between that which is the user namespace (hidden) and that which is TinkerPop+Vendor namespace (system). Renamed Traverser.getSideEffects() to Traverser.sideEffects() so its consistent with Traversal. Ref ##240.
made the distributed sideEffects key shorter so its more attractive looking.