WIP way point.
Merge branch 'master' of github.com:brettviren/worch
Refactor munging to incorporate shell commands.
Break out general munger code to its own module.

Take care of possible multiline shell functions in the environment.

Add a few tests, fix buglets.

simple-with-ups works with this now.
Too annoying to try to support propagating declared shell functions so punt at the expense of a less DRY configuration.