moved all the HyperRogue stuff except RogueViz to namespace 'hr' -- useful when using hr as a library

debug.cpp

@@ -1,6 +1,8 @@
 // Hyperbolic Rogue -- debugging routines
 // Copyright (C) 2011-2018 Zeno Rogue, see 'hyper.cpp' for details
 
+namespace hr {
+
 int steplimit = 0;
 int cstep;
 
@@ -436,3 +438,5 @@ void raiseBuggyGeneration(cell *c, const char *s) {
   else
     c->item = itBuggy;
   }
+
+}