Doom on spring

In Atari 16/32 bit section I’ve added short article about configuration of pmDoom, pmHexen and pmHeretic (last published version 0.55) and about using those ports with all official Doom 1, 2, Heretic and Hexen modules on Atari platform. I’ve also attached corrected configuration files, so now it’s possible to play those games with jagpad controller and there is no missing keys now.