inital implementation of using GitLab OAuth2 provider for signup/login

web/react/pages/signup_user_oauth.jsx

@@ -0,0 +1,11 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+var SignupUserOAuth = require('../components/signup_user_oauth.jsx');
+
+global.window.setup_signup_user_oauth_page = function(user) {
+    React.render(
+        <SignupUserOAuth user={user} />,
+        document.getElementById('signup-user-complete')
+    );
+};