Remove use setting for Gremlin Server. #343

Dynamic dependency configuration slows down Gremlin Server startup.  Use gremlin-server.sh -i instead.
Change the method of dependency manipulation for plugins.

Manifest entry is now a setting for a full move of a file (i.e. you specify the full dependency file name and full dependency file name target location)
Update changelog.
v.property(~acl).key() == ~acl
No more Element.iterators().hiddenProperties(). 2 broken tests around JSON representation. Will work with @spmallette tomorrow morning to get that squared away. Also, need to optimize PropertiesMap as I hacked a fast solution. Refs #311
tweaks to Detached, Tinker, Neo4j around hiddens().
Update all data files given modification to hiddens serialization and api. #311
Remove an extra hiddens property being assigned into the graphson #311
Get the gremlin-driver test to pass around hidden serialization. #311
Edge.vertexIterators() more efficient in Neo4j, Tinker.
Merge branch 'master' into hidden_properties
more optimizations to Edge.itertors().vertexIterators().
Remove "hiddens" from GraphStrategy #311
Merge remote-tracking branch 'origin/hidden_properties' into hidden_properties
javadoc to Vertex.
Updated CHANGELOG where the last merge was Fixed #288
Globally use ServiceLoader for GremlinPlugins already in the path

This is used by Gremlin Server with statically installed plugins with gremlin-server -i
first non-tested push on Gremlin Sacks feature -- Refs #330
All test cases pass. Still have not written 'sack specific' test cases, but the foundation is solid. All the GraphTraversal methods added. There are a few issues I have with the merging methods in Traverser  --- sorta awkward right now. Get that clean and test and then merge to master. Refs #330.
Added SackTest. Found a bug in GraphComputer where the local sideEffects in the distribution computation dont get the sack initialvalue/mergeoperator. This required me to clean up an old hack from long long ago that in turn, rectified this sack situation. Also, this hack greatly reduce object creation in TraversalVertexProgam and respective MapReduce computations. Cool. Refs #330.