more gardening, and converted most fixnum ops to use FBITS and FMAX
more gardening, and converted most fixnum ops to use FBITS and FMAX

yuriy-chumak/OL,yuriy-chumak/OL,aisamanra/owl-lisp,yuriy-chumak/OL,aisamanra/owl-lisp,aoh/owl-lisp,yuriy-chumak/OL,aoh/owl-lisp,yuriy-chumak/OL,aisamanra/owl-lisp,aoh/owl-lisp,yuriy-chumak/OL