Add -O3. Fix 'install' command line
-Tune drawing
-Only take new messages if the last list is already displayed
Cleanup mainloop. TODO: Clean frame length management.
Use future::wait_for() instead of future::wait_until()
debian/control:
 - Priority "important" (huh?) -> optional
 - "Architecture: any" instead of "Architecture: all"
 - Depend directly on libgl1-mesa-glx and libglu1-mesa instead of
   libgl1/libglu1 as software rendering makes really no sense.