- Code: split command
- Doc: README: Link to subtrees article and emphasize it!
- Code: maintain a .gitstrees on every add
- Code: git stree sync, so we dup/sync the config from .gitstrees
- Docs: maintain full help listing as a manpage, too
- Code: install scripts? Puts completion and man in the proper places, etc.
- Code: Unit tests, based on Git's builtin test infrastructure