Oops, die doesn't take an extra parameter anymore
gtws-clone - Clone a repo into a workspace

Add a new command to clone a repo into an existing workspace.  It does
the full setup for the new repo.

This makes several changes:
- Add a default gtws_project_setup_default in gtws.sh that does the
  default setup stuff all my workspaces already did.
- Split gtws_clone_repo from gtws_project_clone_default so that it can
  be called in gtws-clone
- Split gtws_setup_repo from gtws_project_setup_default so that it can
  be called from gtws-clone