Add primary entrypoint script
Add primary entrypoint script

This will replace install.sh. It is better in many ways:
- dynamically find and call build_cli in all __init__.py located in
direct subdirs
- these subscripts will add commands to manarch and declare a callback
function for each
- function is called after parse_args by manarch

jpigree/manarch,jpigree/manarch,jpigree/config