Create new npm scripts, update Readme

Closes #47

README.md

@@ -1,18 +1,22 @@
 # Add-on Recommendation
 Stand-alone add-on for use in Shield studies.
 
-# To build
+# To build an XPI
 ```bash
 $ npm run build
-$ jpm xpi
 ```
 
-This will create `@addon-recommendation-0.0.1.xpi`, which you can install in Firefox.
+This will create `@addon-recommendation-0.0.*.xpi`, which you can install in Firefox.
+
+Alternatively, use jpm run to have jpm start a new instance of Firefox with add-on loaded:
+```bash
+$ npm run styles
+$ jpm run
+```
 
 # To use
 With the add-on installed, navigate to any of the domains listed in
-in `data/recommendation/localData.json`. Currently recommendations are provided
-on Reddit, Wikipedia, and SoundCloud.
+in `data/recommendation/localData.json`. 
 
 # License
 This add-on is licensed under the MPLv2. See the `LICENSE` file for details.

package.json

@@ -14,7 +14,8 @@
     "jetpack"
   ],
   "scripts": {
-    "build": "node-sass data/recommendation/style.scss data/recommendation/style.css --sourcemap=none && jpm xpi",
+    "styles": "node-sass data/recommendation/style.scss data/recommendation/style.css --sourcemap=none",
+    "build": "npm run styles && jpm xpi",
     "lint": "eslint lib data"
   },
   "devDependencies": {