Save and load from DB file using `shelve`
Flexible command structure, with argparse
Limit coverage report to our own module

Add a test that calls main with '-h'
sample-py app
Copyright notices
Merge branch 'master' of dockvm:yadda
Utility module with some output functions
main: show options namespace if verbose
models: Role.all doesn't need to be a method
sample-hs app
arg parsing for `env` command
Some minor git utilities and tests
`env` sub-command mostly working
Substantial progress on init/env, but tests fail
Fix: live host for ssh
Suppress stack-trace in say_call
With -v, show where each thing is happening
Dry runs for env commands; better `say` context
Fix unit tests
Improve coverage of yadda.git to 100%