Superclass of any applications that want to take advantage of the Multitasker
architecture to automatically get configurable audio handling, ticker,
background images, etc.
Callback class to chain two callbacks together - when this callback is
invoked, first it schedules the next callback, then it runs the primary
callback.
Format of preferences definitions: optionKey, "Type[+],Label
[options/for/strings]" Which is to say, the value for a key is a string where
that starts with its Type (one of the LocalOptionProvider TYPE
constants).