Rename the `run` command to `start`

This renames the `run` command to `start`. This is more congruent
with the other commands and is a better opposite to `stop`. This
is also to be consistent with `Qs` command naming scheme.

Closes #20
Merge pull request #27 from redding/jcr-change-run-to-start

Rename the `run` command to `start`