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.
Merge branch 'master' into hidden_properties