UI Improvements to Chatlog Application

Summary: Made improvements to the Chatlog application UI. Added Header & crumbs. Added service name and service type to the channel list table.Also made it less ugly :P

Test Plan: By checking out the chatlog application.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5081