Clarification of the example: all those #default_values are not necessary, they were a leftover because this a badly modified copy/paste…

Initial commit of the AHAH helper module. By using this module, you will no longer have to write menu callbacks, you'll be able to write functional tests even for #ahah-powered form items, graceful degradation becomes easy and adding new #ahah-powered form items in an AHAH callback becomes supported. No core hacks. Sponsored by Mollom.