Fix the cjdcmd config file generation

When I set the permissions of /etc/cjdroute.conf to 0600 for security,
the admin user could no longer read it. This change fixes that and puts
the cjdcmd configuration file in both the root user and admin user's
home directories.
Clean up all older cjdns-related packages on build

This will remove old cjdns-git and cjdcmd-git packages when either one
has a successful build.
Name tasks consistently