Implement deployment tool for sending artifacts to Phabricator

Summary: This implements `DeployTool` which replaces `Pivot.Update` in creating ZIP files.  The resulting ZIP file from running this command will be sent to Harbormaster.

Test Plan: Ran the tool and got a ZIP file that would be suitable for deployment.

Reviewers: Sabre070

Reviewed By: Sabre070

CC: buildbot

Differential Revision: http://code.redpointsoftware.com.au/D119