i think it only makes sense to have an "opinion" for command line
interface in this project, and we probably need more `wutta`
subcommands too but we'll see.
main motivation for this currently is to allow poser apps to define
their own CLI, in particular e.g. `poser install`
and other things, used by other packages (rattail)
otherwise when rattail imports them, the whole WJ model comes along
with it and it can interfere with sqlalchemy-continuum versioning
hoping i do not regret this decision.. since the tests do not live in
a "real" package i think the only way to share code is to add some
things to the main package
this has 100% test coverage and i intend to keep it that way. api
docs have a good start but still need narrative. several more things
must be added before i can seriously consider incorporating into
rattail but this seemed a good save point
