Adds metadata about apps for what file types and protocols they can
handle, then consumes that in the LaunchServer. The LaunchServer can
then use that to offer multiple options for what apps can open a given
URL. Callers can then pass back the handler name to the LaunchServer to
use an alternate app :)
The new system directory /res/apps now contains ".af" files describing
applications (name, category, executable path, and icon.)
These are used to populate the system menu with application shortcuts.
This will replace the Launcher app. :^)
