R1:7c67b5e600c6

Add new jumpnav actions for audits and feed

Test Plan:
type /a<enter> - should jump to audits
type /f<enter> - should jump to feed

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1823