[Success!] [MERGE] Create a single registry of all Hooks classes, removing the test suite knowledge of such hooks and allowing plugins to sensibly and safely define new hooks.

[Bundle Buggy]

This change has been merged.
Previous status: Approved

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C1236825915.31440.0.camel%40lifeless-64%3E
Project: Bazaar