Add autorelease to each object.
Merge the commits below.

commit 4e7e1fa7ce605703e6025ada734b6c319586bd8a
Author: kazuma.morimoto <kazuma.morimoto@gree.net>
Date:   Fri Mar 22 17:37:04 2013 +0900

    Add WebViewPluing template for Xcode
    With excuting ./install-webview-templates-xcode.sh, the template for WebView

commit 9b07a4b0144239ee351a61481d6098af847bebee
Author: kazuma.morimoto <kazuma.morimoto@gree.net>
Date:   Fri Mar 22 16:36:26 2013 +0900

    Fix CCWebView.mm

commit 3ad692b9aa7f407a222175501e1b4fc6542cc4c6
Author: kazuma.morimoto <kazuma.morimoto@gree.net>
Date:   Fri Mar 22 14:14:00 2013 +0900

        Add WebView Plugin for Android, iOS
        User can use webview function from cocos2dx context.

        Sample implementation:
        CCGreeWebView *pWebView;
        pWebView = CCGreeWebView::create();
        pWebView->setVisibility(true);
        pWebView->setRect(0, 0, size.width, size.height);
        //If you'd like to catche callback from JavaScript
        CCGreePlatform::setWebViewDelegate(this);
        //Example for Android
        pWebView->evaluateJS( ¥
                    "window.addEventListener('load', function() {" ¥
                    "   window.addEventListener('click', function() {" ¥
                    "       Cocos2dx.call('clicked');" ¥
                    "   }, false);" ¥
                    "}, false);");
        pWebView->loadUrl("http://www.xxxxxxxxxxxxx");

        //And
        void HelloWorld::callbackFromJS(CCGreeWebView *webview, CCString* messag
            CCLog("++++++++ Callback %s", message->getCString());
        }

commit bebe0a77d8d298a663173bf524cebbd7a1db5b69
Author: kazuma.morimoto <kazuma.morimoto@gree.net>
Date:   Thu Mar 21 14:54:50 2013 +0900

    Modify GreeBasicSample

commit bec145b50fbeab92c187e21815778c0003c8f1f1
Author: kazuma.morimoto <kazuma.morimoto@gree.net>
Date:   Tue Mar 19 18:50:39 2013 +0900

    Modify sample for iOS (add payment, sharedialog, invitedialog testcode)
Modify sample for iOS.
(add retain for the CCImage got by loadThumbnailSuccess, because library was modified to set autorelease to it.
 Without retain, the CCImage instance you got will be released.)
Merge the commits below.

commit 28df3a087406e5ec6afb2862341ee7f22a2deee8
Author: Kazuma Morimoto <kazuma.morimoto@gree.net>
Date:   Thu Mar 28 17:42:16 2013 +0900

    Add WebViewTest sample application for Android.