Initial commit

GET /api/overview is functional. Tests need to be ported to
a higher-level library such as Ginkgo.
Update .gitignore to use github/gitignore
Port existing test to Ginkgo and Gomega
Implement GET /api/nodes (client.ListNodes)
Add NodeInfo.Contexts
Extract duplicated code
Add README stub
2-clause BSD
Merge branch 'master' of github.com:michaelklishin/rabbit-hole