Merge tag 'v0.4.0'

v0.4.0
fix broken links in README

Close #38
doc: add CONTRIBUTING.md and LICENSE.md
Update link to doc
Fix link to docs (again)
Remove control channel and CLI

strong-cluster-control is now only a cluster wrapper, run-time control
is being moved to strong-supervisor, including control channel and CLI.
Merge pull request #40 from strongloop/feature/remove-control-channel

Remove control channel and CLI
Update package keywords, sort order, and bins
v0.5.0
Merge branch 'release/0.5.0' into production