- re-introduce the somewhat redundant base class UI (it used to exist!)
  - improve and factor cli specific stuff into pisi.cli
  - introduce ack and choose functions, implement choose in cli
  - get rid of the cli-specific slash-ns, so many of them :/
* work towards doing the list type in autoxml the right way
  - breaks the unit test, but cleaner than before now
  - after lists, classes and localized text
  - that's how i'll implement the component tree, hmmm :)
* some more detail on the todo