Using git protocol instead of https.

Author: James Chen

.gitmodules

@@ -1,15 +1,15 @@
 [submodule "tools/bindings-generator"]
 	path = tools/bindings-generator
-	url = https://github.com/cocos2d/bindings-generator.git
+	url = git://github.com/cocos2d/bindings-generator.git
 [submodule "scripting/javascript/bindings/generated"]
 	path = scripting/javascript/bindings/generated
 	url = git://github.com/folecr/cocos2dx-autogen-bindings.git
 [submodule "samples/Javascript/Shared"]
 	path = samples/Javascript/Shared
-	url = https://github.com/cocos2d/cocos2d-js-tests.git
+	url = git://github.com/cocos2d/cocos2d-js-tests.git
 [submodule "external/emscripten"]
 	path = external/emscripten
-	url = https://github.com/kripken/emscripten.git
+	url = git://github.com/kripken/emscripten.git
 [submodule "tools/cocos2d-console"]
 	path = tools/cocos2d-console
-	url = https://github.com/cocos2d/cocos2d-console.git
+	url = git://github.com/cocos2d/cocos2d-console.git