1. Proper cleanup of the code.
2. Migrate the card in question to the VGA class list as it's actually a rebadged VGA Edge (thus 18800).
3. Some VGA only features are not supported on this card and are documented in the recalctimings.
Implemented the American XT computer and the Iskra 3104(A clone made in Belarusian SSR). Also removed the Goldstar 386 & the Unknown Headland 386SX board as they were very buggy and their purpose is now served by the much better Intel 82335 boards.
- 86Box's own headers go to /86box
- munt's public interface goes to /mt32emu
- all slirp headers go to /slirp (might want to consider using only its public inteface)
- single file headers from other projects go in include root