port over parameter-driven presets support from master, which (stupidly) was part of a much larger commit and so couldn't be merged over. This allows use of cartographer 0.4-SNAPSHOT, which also contains GraphMutator/VersionManager support that enables tracking of dependencyManagement sections down through the dependency graph as it's discovered and traversed.
updating ruby depgraph client to allow configuration of context path, and add shell script to unpack/launch a launcher tarball with logging tee'd to a file.