update README

README.md

@@ -4,6 +4,9 @@
 2. Make sure you have [Node.js](https://nodejs.org/en/download/current/) installed
 3. Make sure you have gulp globally installed, `npm install -g gulp`
 4. Install local dependencies by running `npm install` in the root directory of this project
-5. Run `gulp`
+5. Run:
+    1. `gulp watch` to launch a local server and watch files
+    2. `gulp build` to build a minified version of the project
+    3. `gulp clean` to clean the `build` folder
 
 If you get any errors when running `gulp`, try installing the Stylus plugins globally by running `npm install -g [email protected] nib rupture`.