TremZ/Unvanquished — pull request #73 by dsalt (2012-03-21 19:10:49+00:00)
Title: JPEG & PNG include/compile fixups

This is a port of what's on my Debian branch (from which they'll be dropped when the time comes for merge).

• Use external JPEG and PNG headers if requested & available.
• Allow building with libjpeg62 (backward compatibility).
• JPEG internals aren't needed (forward comparibility).