R1:0b0bc20e11bd

Package Conpherence CSS

Summary: Ref T5390, creates a Conpherence CSS package for fewer download connections.

Test Plan: celerity map

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T5390

Differential Revision: https://secure.phabricator.com/D16535