Allow plugins to have a process callback so they can modify the plugin directly to provide smarter defaults, plus add some more formal documentation in the advanced help.

- a tool for AJAX, which is the next generation tool based on what Views uses.
- a tool for modals -- completely ripping the modal out of Panels.
- moving plugins for 'arguments', 'relationships' and 'contexts' into CTools.

Add callbacks to the collapsible so that it can be trivially transformed into other things like an accordion. Add accordion functionality to the task admin UI.

Chaos Tools API initial, early checkin. This module provides 4 API tools, plus an early version of the delegator module. See http://views2.logrus.com/overrides for a discussion of delegator.module.