chore(doc): update the instructions for setting up dev env. (#603)

ref. #550

DEV_ENVIRONMENT.md

@@ -1,6 +1,6 @@
 # Developer guide: getting your environment set up
 
-1. Make sure you have `node` installed with a version at _least_ 4.2.3.
+1. Make sure you have `node` installed with a version at _least_ 5.5.0.
 2. Run `npm install -g angular-cli` to install the Angular CLI.
 3. Fork the `angular/material2` repo. 
 4. Clone your fork. 
@@ -8,40 +8,37 @@
    and `<your-username>` for your fork. Also see the [team git shortcuts](https://github.com/angular/material2/wiki/Team-git----bash-shortcuts).
 5. From the root of the project, run `npm install`, then run `npm run typings` to install typescript definitions.
 
-
 To build the project, run `ng build`. 
 To watch for changes and automatically rebuild, run `ng build --watch`
 
 To bring up a local server, run `ng serve`. This will automatically watch for changes and rebuild.
 After the changes rebuild, the browser currently needs to be manually refreshed.
 
-To run unit tests, run `npm test`.
+### Running unit tests
 
-###Running e2e tests:
+To run unit tests, run `npm test` or use the CLI with `ng test`.
+
+### Running e2e tests
 
 To prepare your environment, you'll need to install protractor and selenium.
 
-1. Globally install protractor:
-
-```
-npm install -g protractor
+```bash
+# 1. Install the correct selenium version with webdriver-manager (this comes with protractor):
+npm run webdriver-manager update
 ```
 
-2.  Install the correct selenium version with webdriver-manager (this comes with protractor):
+In order to run the tests:
 
-```
-webdriver-manager update
+```bash
+# 1. Spin up a local server with 
+MD_APP=e2e ng serve
+
+# 2. Run tests with:
+ng e2e
 ```
 
-When running the tests:
+### Running benchmarks
+Not yet implemented.
 
-1.  Spin up a local server with `ng serve`. 
-
-2.  Run tests with:
-
-```
-protractor test/protractor.conf.js
-```
-
-Running benchmarks: not yet implemented
-Running screenshot diff tests: not yet implemented
+### Running screenshot diff tests.
+Not yet implemented.

package.json

@@ -18,7 +18,8 @@
     "postinstall": "npm run typings",
     "e2e": "protractor",
     "inline-resources": "node ./scripts/release/inline-resources.js ./dist/components",
-    "deploy": "firebase deploy"
+    "deploy": "firebase deploy",
+    "webdriver-manager": "webdriver-manager"
   },
   "version": "2.0.0-alpha.5-2",
   "license": "MIT",