R1:e48b290094db

Fix URI map rules to restore public feed

Summary: The /public/ rule needs to come before the more general subfilter rule.

Test Plan: Hit "all", "my projects" and "public" feeds, they all work.

Reviewers: davidreuss

Reviewed By: davidreuss

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1667