Merge pull request #92 from smurfix/upstream

Missing quotes in sample code
Tests: remove superfluous lambda
Fix outdated docstring
Tests: Replace Flask with minimal test scaffolding
Add capability for sub-managers to manage their own options

This change *removes* the ability to mix-and-match commands and
options. This means that you now can do
$ manage.py --host=webserver config backend --host=appserver

The actual parameter spaces must still be different.