PNG optimization

[Mike Nordell]

While looking at a snapshot from about one week ago, I noticed two things.

1. The QNX PNGs are all undisplayable and seemingly also uncompressed from
the size of'em.
2. The other larger PNGs (80-90KB) were a bit on the large side. A run
throught 'pngcrush' got'em down to about 50KB.

Known issues?

/Mike - please don't CC