Summary:
Add a very basic edit history table to herald rules. This table is updated
whenever saving a herald rule. The contents of the save are not examined, and
the edit history contains no information about the rule itself *yet*. Edit
history can be viewed by anyone through /herald/history/<rule id>/.
Task ID: #
Blame Rev:
Test Plan:
Made a test rule, saved some stuff.
Revert Plan:
Tags:
Reviewers: epriestley, jungejason
Reviewed By: epriestley
CC: zizzy, aran, xela, epriestley
Differential Revision: https://secure.phabricator.com/D1387
