Removed the variable limit setting since it's never used and instead just have WALL_PATH_LIMIT.

constants.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+/*
+ * Eventually move most of these into runtime locations.
+ */
+const int INV_WALL = 0;
+const int INV_SPACE = 1;
+const int WALL_VALUE = 1;
+const int SPACE_VALUE = 0;
+const int WALL_PATH_LIMIT = 1000;
+const int WALL_LIGHT_LEVEL = 3;