- allow MIX arithmetics at the mixvm prompt
- compile+load command
- mixvm trace command outputting executed instructions
- allow MIXAL instructions as commands at the mixvm prompt
  (e.g. MIX > exec LDA 2000)
- improve detection of pseudoinstructions in mixasm listing files
- include timing statistics

* allow abbrevs of mixvm commands (e.g. ed file -> edit file)
* ncurses based frontend
* add GTK/GNOME support (see gaby's config hacks for making it optional)