1.Generate multiple output js files one with vendor polyfills and one

without.
2.Update README.md file

Author: muthurathinam-m

README.md

@@ -23,6 +23,11 @@ Include [lib/graph-js-sdk-web.js](https://github.com/microsoftgraph/msgraph-sdk-
 <script type="text/javascript" src="graph-js-sdk-web.js"></script>
 ```
 
+If your application has polyfills for **Fetch-API** and **ES6-Promise**, then you can just include [lib/graph-js-sdk-core.js](https://github.com/microsoftgraph/msgraph-sdk-javascript/raw/master/lib/graph-js-sdk-core.js) in your page.
+```html
+<script type="text/javascript" src="graph-js-sdk-core.js"></script>
+```
+
 ## Usage
 ### Initialize client with access token provider
 This client library only handles authentication in the most basic way possible. The application is responsible for refreshing tokens and returning an immediately valid access token in the authentication provider.

core-browserify.js

@@ -0,0 +1,6 @@
+var browserify = require('browserify');
+var b = browserify();
+b.add('./browser-wrapper.js');
+b.external("es6-promise");
+b.external("isomorphic-fetch");
+b.bundle().pipe(process.stdout);

lib/graph-js-sdk-core.js

@@ -1,7 +1,7 @@
 export declare let oDataQueryNames: string[];
 export declare const DEFAULT_VERSION = "v1.0";
 export declare const GRAPH_BASE_URL = "https://graph.microsoft.com/";
-export declare const PACKAGE_VERSION = "1.0.0";
+export declare const PACKAGE_VERSION = "1.1.0";
 export interface AuthProviderCallback {
     (error: any, accessToken: string): void;
 }

lib/graph-js-sdk-web.js

@@ -18,7 +18,12 @@
     "uglify-js": "^3.4.5"
   },
   "scripts": {
-    "build": "tsc && node node-browserify.js > lib/graph-js-sdk-web.js && uglifyjs ./lib/graph-js-sdk-web.js --output ./lib/graph-js-sdk-web.js",
+    "compile": "tsc",
+    "rollup-core": "node core-browserify.js > lib/graph-js-sdk-core.js && uglifyjs lib/graph-js-sdk-core.js --output lib/graph-js-sdk-core.js",
+    "rollup-with-vendor": "node node-browserify.js > lib/graph-js-sdk-web.js && uglifyjs ./lib/graph-js-sdk-web.js --output ./lib/graph-js-sdk-web.js",
+    "build-core": "npm run compile && npm run rollup-core",
+    "build-with-vendor": "npm run compile && npm run rollup-with-vendor",
+    "build": "npm run compile && npm run rollup-core && npm run rollup-with-vendor",
     "test": "mocha lib/spec/core",
     "test:types": "tsc --p spec/types && mocha spec/types"
   },