anchor.diff:  * Improved the logging of the Gremlin Server REST endpoint as it pertained to script execution failures.
   * `TraversalExplanation` is now `Serializable` and compatible with GraphSON and Gryo serialization.
   * Fixed a problem with global bindings in Gremlin Server which weren't properly designed to handle concurrent modification.
  -* Deprecated `ScriptElementFactory` and made the local `StarGraph` globally available for `ScriptInputFormat`'s `parse()` method.
  +* Deprecated `ScriptElementFactory` and made the local `StarGraph` globally available for `ScriptInputFormat` 's `parse()` method.
   * Improved reusability of unique test directory creation in `/target` for `AbstractGraphProvider`, which was formerly only available to Neo4j, by adding `makeTestDirectory()`.
   * Optimized memory-usage in `TraversalVertexProgram`.
   * `Graph` instances are not merely "closed" at the end of tests, they are "cleared" via `GraphProvider.clear()`, which should in turn cleans up old data for an implementation.
  
positive.code: * Added `B_LP_O_S_SE_SL_Traverser` in support of `TraverserRequirement.LABELED_PATH`.
  * Added `TraverserRequirement.LABELED_PATH` which only generates path data for steps that are labeled (greatly increases the likelihood of bulking).
  * Fixed a bug in `Path` usage that required an API update: `Path.addLabel()` is now `Path.extend(Set<String>)` and `Traverser.addLabels(Set<String>)`.
  * Made `Path` iterable, so that it can be `unfold()`'ed and used by local steps like `min(local)`, `max(local)`, etc.
  * `WhereTraversalStep` and `WherePredicateStep` are now the only "special" `Scoping` steps after `MatchStartStep` in `match()`.
  
  ==== Bugs
  
negative.code: * Bumped `neo4j-graph` to Neo4j 2.1.6.
  * Bumped to Groovy 2.4.1.
  * Added a new "performance" test suite for Gremlin Process.
  * Steps now only operate with traversals -- no more lambdas. Lambda-> `Traversal` conversion utilities added.
  * `SideEffectStep` always requires a `Consumer`. Steps that were consumer-less simply extends `AbstractStep`.
  * Simplified the `Neo4jGraph` implementation by now allowing `cypher()` mid-traversal. Only available via `g.cypher()`.
  * Moved `clock()` out of the Utility plugin. It is now available to both Groovy and Java.
  