19/07/1999: Minor Updates

Added better thumbnail game box images for Dungeon Master, Neuromancer, Balance of Power, Questron 2 and Transylvania 3 thanks to Mary Sauer. Also added better thumbnails for Spirit of Excalibur and Gold of the Americas (from the Mac versions). Thanks goes to Willie Yeo for these, and I'd also just like to thank Willie for scans he has provided in the past. Finally, I've also added a better thumbnail for Serve and Volley, which was included with a mint condition ROM01 Apple IIGS - much thanks to Barbara Brook, for allowing me to clean out your cupboard!