Checkout qml-box2d via https

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "3rdparty/qml-box2d"]
 	path = 3rdparty/qml-box2d
-	url = git@github.com:qml-box2d/qml-box2d.git
+	url = https://github.com/qml-box2d/qml-box2d.git