Order commands alphabetically

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Print long usage on usage error

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Add "orchard run" command

It starts a proxy to an Orchard host, then runs a local command
with the DOCKER_HOST envvar set.

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Merge pull request #14 from orchardup/add-run-command

Add "orchard run" command