adding directory to build mmixtools, first: mmoimg.exe
removing mmix (to mmix repository) moving src/mmix/bios/ to src/bios
ignoring files removing show_operating_system if undef VMB
fixing bugs in running, source options, breakpoints, debugging
changing MMIX_LOAD_FILE_LOC
fixing breakpoints in mmixvd
keeping the lines of assembler errors better in view
changing the editor key bindings and adding help for it
fixed bug in opening HtmlHelp keyword lookup
fixing projects for devices
