added postinstall script and updated readme.md

Author: igniteram

README.md

@@ -40,11 +40,11 @@ Clone the github repository:
 
     git clone https://github.com/angular/protractor.git
     cd protractor
+
+Install all the dependencies in the folder:
+
     npm install
-    ./bin/webdriver-manager update
-    cd website
-    npm install
-    cd ..
+
 
 Start up a selenium server. By default, the tests expect the selenium server to be running at `http://localhost:4444/wd/hub`. A selenium server can be started with [webdriver-manager](https://github.com/angular/webdriver-manager) which is included in
 [bin/webdriver-manager](https://github.com/angular/protractor/blob/master/bin/webdriver-manager).
@@ -54,11 +54,7 @@ Start up a selenium server. By default, the tests expect the selenium server to
 
 Protractor's test suite runs against the included test application.
 
-Install the test application dependencies with:
-
-    npm run install_testapp
-
-Start that up with
+Start the test application with
 
     npm start
 

package.json

@@ -62,10 +62,12 @@
   "main": "built/index.js",
   "typings": "built/index.d.ts",
   "scripts": {
+    "postinstall": "cd bin && webdriver-manager update && npm run install_website && npm run install_testapp",
     "prepublish": "gulp prepublish",
     "pretest": "gulp pretest",
     "start": "node testapp/scripts/web-server.js",
     "test": "node scripts/test.js",
+    "install_website":"cd website && npm install",
     "install_testapp": "cd testapp && npm install",
     "tsc": "./node_modules/typescript/bin/tsc",
     "tsc:w": "./node_modules/typescript/bin/tsc -w"