Macro - allow view controller to be viewed publicly

Summary: Fixes T5735, setting up Phacility for huge financial success.

Test Plan:
opened up Safari - who logs in with Safari anyway? - and could still view a macro
could also view the list of macros

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5735

Differential Revision: https://secure.phabricator.com/D10170