todo

树大根深三棱尽所标杆ssfsfsa fdsafs

* clean up global variables in display.c, make one state variable

* abstract case IO from display.c

* Now that we use Xt, use a more modern file picker.

* provide a simple case that doesn't need Xpm.

* support session management

* Documentation needs to be updated.

* Port to cygwin32.  That would be cool as xcopilot's ancestry is in win32.

* Use automated CPU build stuff from latest UAE dist.

* use drag and drop

* bare option with no case graphic.  Suggested by Malcom Herbert.  Apparently
  the Windows version has this.

* From Max Okumoto:

   * Create cradle.xpm

   * Modify code so when you use the -serial flag and the
     port is a pty the cradle appears.  In addition handle
     someone pressing the hotsync button.