update SBCL instruction per Christophe Rhodes with mods by me
update SBCL instruction per Christophe Rhodes with mods by me

onixie/mcclim,onixie/mcclim,swflint/McCLIM,slyrus/mcclim,slyrus/mcclim,swflint/McCLIM,antifuchs/mcclim,antifuchs/mcclim,swflint/McCLIM,onixie/mcclim