express app for testing runner
basic run of a package in current working directory
default cluster size to 1 so app is supervised

It needs 1 or more workers to be supervisable, clustering can be
disabled with --size=0, or equivalent.
runner supports options, and app arguments

Supports help, and version, as well as the common cluster-control
options (size, port, path, and addr) that strong-cluster-control's
loadOptions() will parse from process.argv.
clusterctl utility installed as peer dep of slr
refactor options processing to cluster master
sort package.json properties meaningfully
pull config evaluation into its own module
test supervisor with loopback
test runner with express app
express module app for testing runner
install test dependencies
test runner with module app
arguments should be passed thru to app
fix test assumptions about truth and arguments

`0` values are false in js, I always forget that, and the exit event's
arguments aren't valid for a mocha done callback, they need to be
dropped.
test help and version arguments
!fixup TEST
!fixup TODO