Lua : Create Lua extern for global methods

std/lua/Boot.hx

@@ -22,8 +22,6 @@
 package lua;
 
 class Boot {
-	public static var unpack : Dynamic->Table<Int,Dynamic> = untyped __lua__("function(...) return {...} end");
-
 	static function __unhtml(s : String) {
 		return s.split("&").join("&amp;").split("<").join("&lt;").split(">").join("&gt;");
 	}

std/lua/Lua.hx

@@ -0,0 +1,12 @@
+package lua;
+
+/**
+  These are all global static methods within lua
+**/
+
+@:native("_G")
+extern Lua {
+	public static function unpack : Dynamic->Table<Int,Dynamic>; 
+	public static function setmetatable : Table->Table->Void; 
+	public static function setfenv : Int->Table->Void;
+}