- All images are loaded through the image manager
- Architected to allow the use of prepared or unprepared images (and
volatile images when the day comes that they support alpha)
- Tunable caches for images and tiles
- Resource manager caches unpacked resources on the filesystem
- Various and sundry other cleanups
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2116 542714f4-19e9-0310-aa3c-eee0fc999fb1