Forgot to add file containing std constants.

constants/std_constants.asm

@@ -0,0 +1,13 @@
+	enum_start
+	enum pokecenternurse
+	enum difficultbookshelf
+	enum picturebookshelf
+	enum magazinebookshelf
+	enum teamrocketoath
+	enum incenseburner
+	enum merchandiseshelf
+	enum townmap
+	enum window
+	enum tv
+	enum homepage
+	enum radio