Enhance Setup your Amber clone

Add a little more info and reference links for new users

CONTRIBUTING.md

@@ -61,8 +61,9 @@ Setup your Amber clone
 
 1. Create a fork of the repository on GitHub
 2. Clone the repository
-3. Run ```npm install```
-4. Run ```bower install``` (requires bower to be installed via ```npm install -g bower```)
+3. Run ```npm install``` to install dependencies listed in package.json (See [here](https://www.npmjs.org/doc/cli/npm-install.html for more info) for more info)
+4. Run ```bower install``` to install dependencies listed in bower.json (See [here](http://bower.io/) for more info)
+  - requires bower to be installed via ```npm install -g bower```
 5. Run ```${Amber_DIR}/bin/amber serve```
 
 Now you should be able to commit changes to your computer.