Initial commit of NED1 front panel code I've been hacking on.

Thus far, it draws and XScreensaver compatible, dynamically sized front panel
and glues it to a simplified NEDsim instance.

The a.out format input file is hardcoded as "./test.out", and many other things
are hardcoded/WIP at this time, but the basic simulator runs NED code and
displays (with poor visual synchronization) the correct state.