Fix TokenGiven stories for Asana
Summary: Ref T6201. This isn't quite perfect but should be good enough. At some point far in the future I plan to revamp feed rendering a bit. This should possibly become a real ApplicationTransaction story eventually, too.
Test Plan:
Reviewers: btrahan, chad
Reviewed By: chad
Subscribers: epriestley
Maniphest Tasks: T6201
Differential Revision: https://secure.phabricator.com/D10625