* Squelching a lot of debugging output, unless DEBUG is #define'd

* Added "--joystick-dev" option, for specifying which joystick device
   Tux Paint should listen to
   * "--joystick-dev list" is now used to list the available devices
 * Cleaned up some 'usage' output

src/parse.h

@@ -58,6 +58,7 @@ struct cfginfo
   const char *onscreen_keyboard;
   const char *onscreen_keyboard_layout;
   const char *onscreen_keyboard_disable_change;
+  const char *joystick_dev;
   const char *joystick_slowness;
   const char *joystick_lowthreshold;
   const char *joystick_maxsteps;