Added "ProDOS" (lowercase) info in A2OSX.BUILD.po
-bugfix in SHELL batch mode, CP, FORMAT, ENV processing -CHTYP Command running. -Now, A2OSX.BOOT media is built from MAKEBOOT script from A2OSX.BUILD
many bugfixes in LS,CAT, FILEENUM....moved UsrBuf256 off $200 (now $C00) getting corrupted by ProDOS/regular Clock Drivers (not KM.*) CHTYP in progress mainly for : CHTYP /A2OSX.BOOT/A2OSX.SYSTEM SYS (S-CMASM 2.0 is unable to generate .SYS files)