This is Python 2.6 only!

To add a new command to wizard, you need to touch the following
locations:

- bin/wizard
    Add a line describing your command in the helpstring
- lib/wizard/command/__init__.py
    Add the line "import commandname"
- lib/wizard/command/commandname.py
    Implement your command there as commandname()

Design decision:
- A mass tool will plow ahead even if the subcommand throws
  Wizard errors.  Normal errors will cause us to halt
  completely.  If the error that occured is within the realm
  of possibly, and should be dealt with by manual intervention
  (or even possibly a code change), and would not cause harm
  if we continued going, we will keep going, and let the maintainer
  deal later on with the errors en masse.