The commands: install, update, uninstall, info, make-current and run
now supports specifying a partial ref for the name. This is a different
way of specifying optional arch and branch arguments.
For instance org.app.App//master is the same as "org.app.App master" or
"--branch=master org.app.App".
This is useful if you're cutting and pasting from e.g. the list -d output.