blog style update

Not a very elegant update. I accidentally made all these duplicate files when precompiling. I then deleted them. But I wasn't sure if I should delete all of the .gz files, too.

Tell me if this update is garbage for you, and I'll start from scratch.

The gist of this commit is:

the 'PPM-SplashTile-BW-Inverted.png' background image
the 'pinballmapcom' image
stylesheet updates
application.html updates

4 files updated.