arogue7, xrogue: begin using autoconf.

File locations can be customized via './configure'.  'make install'
does not work yet.  Options for wizard mode and load checks may not do
what is intended.

Fun fact: there's an enlightening epigraph in the introduction to the
autoconf manual.

xrogue/rogue.h

@@ -16,6 +16,10 @@
     See the file LICENSE.TXT for full copyright and licensing information.
 */ 
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 /*
  * some compiler don't handle void pointers well so
  */