Update README.md

* `npm install` will install the dependencies defined in "package.json". Therefore, any modifications to the "package.json" should be made carefully.

README.md

@@ -19,7 +19,7 @@ Comments/contributions are welcome.
  * `git reset --hard origin/master`
  * `rm www/img/ionic.png www/css/style.css` files.
  * `mv www/js/config.tmpl.js www/js/config.js`
- * `npm install` to grab dependencies
+ * `npm install` to grab the dependencies defined in the *package.json*.
  * run `gulp sass` to generate CSS from SCSS.
  * run `bower install angular-inview`
  * Get a MTA Bus Time Developer API key. Go [here](http://spreadsheets.google.com/viewform?hl=en&formkey=dG9kcGIxRFpSS0NhQWM4UjA0V0VkNGc6MQ#gid=0) to request one. You will receive the key within half an hour.