Add an abstract method to the base driver class and a concrete implementation in the streams driver class that returns a list of added event handlers.
Add a new Command-based plugin, Help, that gets this list and iterates through it, using reflection to determine what plugins are subclasses of the Command plugin and providing a method of looking up their prototypes. Method descriptions could also be included, either by parsing docblocks or by providing a method that allows for them to be explicitly set in the init() method of each Command subclass.
