
- Detect recursion in Controller_Front

- Exception handling inside Controller_Front

- Classes extending Controller_Action will need to have their action
  method name prepended with "Action" to avoid collision with PHP constructs
  like list().  This is not presently a requirement but will be.

- Make mod_rewrite an optional dependency only.

- End-user Documentation

- Routing mechanism is a placeholder at this time.  Although it is fully
  working, and we're using it on some sites, it is not flexible enough.  We
  are going to replace it with a flexible URI rewriting system.

