added migrations for instant delivery

node_modules/ga-react-router/README.md

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+# Google analytics for react-router
+
+## How to use
+
+1. `npm install ga-react-router`
+2. In your `webpack.config.js` add `new webpack.DefinePlugin({GA_TRACKING_CODE: JSON.stringify('XXXXXXXX')})`
+3. Use analytics in your `Router.run` code.
+
+## Example
+
+```js
+'use strict';
+var React = require('react');
+var Router = require('react-router');
+var analytics = require('ga-react-router');
+
+var routes = require('./routes');
+
+Router.run(routes, Router.HistoryLocation, function(Handler, state) {
+  React.render(<Handler />, document.getElementById('content'));
+  analytics(state);
+});
+```