R1:14fe3f5d1426

Implement getHelpURI() for new applications

Summary: A bunch of recently-created applications have help available; link to it.

Test Plan: Clicked each app, clicked help link in menu bar, ended up in relevant documentation.

Reviewers: vrana, btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D3602