README: add a "runtime options" section;
README: add a "runtime options" section;

jankeromnes/kresus,bnjbvr/kresus,rlustin/kresus,ZeHiro/kresus,jankeromnes/kresus,bnjbvr/kresus,ZeHiro/kresus,rlustin/kresus,ZeHiro/kresus,jankeromnes/kresus,rlustin/kresus,ZeHiro/kresus,bnjbvr/kresus,jankeromnes/kresus,bnjbvr/kresus,rlustin/kresus