use uTransformers v0.2

Hi Kevin,

This updates the repo to use uTransformers v0.2. Was pretty easy, everything "just works".

I would like to update the churn sample app to, for example, allow inputting regexes in the UI...but I'll leave that for a separate pull request.
Totally. One of my next tasks is to move the new build layout. Unless you have a strong objection, I'll do that *after* this merge.