Apply Dual MIT/StrongLoop license
Install CLI as sl-clusterctl

This is for consistency with strongloop toolbox naming, and to allow
integration as an slc/strong-cli sub-command.
Merge pull request #31 from strongloop/feature/toolbox

Install CLI as sl-clusterctl
example-master, log information about environment

example-master is mostly for testing, log the options loaded, and
information about process identity (master/worker/id/pid).
Prefer cluster to size in command line and config

The name makes more sense when used on a command line, and with
strong-supervisor. Size is still supported.

See SLN-752
Note existence of strong-supervisor in README
Merge pull request #33 from strongloop/feature/usability-tweaks

Feature/usability tweaks
Add utility to humanize duration
test: expand tests to include worker properties
Ensure workers are proper before extracting status

Control channel is needed to generate uptime.
Improve readability of 'clusterctl status'

Use a human friendly format for uptime
sync to master for CI, will rebase for PR merge later