IRC Bot what's new directive

Summary:
Added "What's new?" to the ircbot

Matches

What is new?
What's new?
Whats new

Test Plan:
<`Korvin> what is new?
<korvinbot-local> Derpen created D1: Herped the derp - http://phabricator.net/D1

It shows five.

Reviewers: epriestley

Reviewed By: epriestley

CC: epriestley, aran

Differential Revision: https://secure.phabricator.com/D1666