[game_preservation] SIG Icon and theme Atari Joystick + Belljar

[Andrew Armstrong]

Some off list discussion with Devin suggested thicker glass might be 
better, so here we are:

http://aarmstrong.org/gallery/v/projects/preslogos/Belljar+over+Joystick+thicker+glass.png.html

Not sure about it entirely myself, might just need a bit of cleaning up 
in places to look better though. Scales better down to favicon size though.

Andrew