Remove extra copyright files
Point cartridges at user dir, rather than os rom dir
Merged in first cut cartridge emulation support from Hias. Excellent:-)
Updated firmware
First cut of 5200 support for the DE1. Might want to share this with the Atari 800 verison - with a generic. PAL/NTSC PLL not working for some reason... firmware forked for 5200 - will be merged before commit