20200614 ROM set

OBattler (5):
Added all the missing ROM's.
Added the ASUS PVI-486AP4 BIOS.

anabate123 (3):
Added the Gateway 2000 OEM Zappa ROM

nerd73 (2):
Remove 5itw001.bin, the ROM for the Gigabyte GA-586T2 machine.
Add Tx0720ug.bin, the ROM for the PC Partner MB540N machine.

tiseno100 (11):
Removed the 807DS ROM
Added the Biostar 430VX ROM
Delete the P6KFX ROM
Added the KN97 ROM
Removed the QDI Advance II ROM
Added the QDI Excellent II ROM
Delete the S2DGE
Added 3 new roms (440LX, 440GX & OPTi Python)
Added the Acer V60N ROM