Ignore backup files.
Stub of NPM module with Mocha tests.
Add lint support.
Stub of a factory that returns a Graphviz digraph.
Provide empty in-memory graph from test harness.
Implement vertex and edge traversal with side effect to populate graphviz graph.
Add test harness using the 'classic' TinkerPop graph.
Implement vertex rendering.
Failed implementation of edge rendering.
Bind gremlin arg to the wrapper calls so that method calls work.
Working implementation that avoids reentry via node-java.
Correct the direction of the edges.
Add vertex/edge count tests.
Add test for force-directed graph PNG generation.
Finish the example code in the README.
Add Travis CI configuration.
Switch Travis CI config to Java so node-java (in gremlin-v3) works.
Travis: Move graphviz install to before_install
Merge pull request #2 from mhfrantz/chore/Set-up-Travis-CI-on-gremlin-graphviz-repo_83501916

[Delivers #83501916] Get Travis CI working
Switch from PNG to sanitized SVG to be less flaky across platforms.