R1:2538f6717836

Add some more builtin project images

Summary: Moves over some of the icons we build for SAAS that can be useful for projects to. Also make builtin list dynamic.

Test Plan: Edit a project image, select a cool sword.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D18297