Decouple <vector>

src/Difficulty.cpp

@@ -9,6 +9,9 @@
 #include "Steps.h"
 #include "Trail.h"
 
+#include <vector>
+
+
 static const char *DifficultyNames[] = {
 	"Beginner",
 	"Easy",
@@ -165,7 +168,7 @@ LuaFunction( TrailToCustomDifficulty, TrailToCustomDifficulty(Luna<Trail>::check
 /*
  * (c) 2001-2004 Chris Danford
  * All rights reserved.
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
@@ -175,7 +178,7 @@ LuaFunction( TrailToCustomDifficulty, TrailToCustomDifficulty(Luna<Trail>::check
  * copyright notice(s) and this permission notice appear in all copies of
  * the Software and that both the above copyright notice(s) and this
  * permission notice appear in supporting documentation.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF