Event Changes
Event Changes

Update event system to match the tests added yesterday. Add _EventHook
class to replace the (callback, pre) tuples used previously for hooks.
Remove named_hooks attribute from _Event class. Update the hook and
unhook methods of the EventManager class as well as the __enter__ and
__exit__ methods of the _EventContext class to reflect these new changes.

whutch/cwmud,whutch/atria