SVN commit 1000003 by mattr:

Add database tables for canned responses.

This is the start of the canned responses extension, which will allow
people to reuse certain comment message, bug status, and bug resolution
combinations to make those bug triage sessions really easy.

Waiting on some things from upstream for the rest though.

 A             canned-responses (directory)  
 A             canned-responses/code (directory)  
 A             canned-responses/code/db_schema-abstract_schema.pl