make start:ui appear as a refinement to start, rather then an entirely disjoint command.

Author: stefanpenner

README.md

@@ -17,7 +17,7 @@ which enables tweaking the UI of the site without actually having the server
 running locally. To get up and running with just the UI, run:
 
 ```
-npm run startui
+npm run start:ui
 ```
 
 This will give you a local server to browse while using the staging backend

package.json

@@ -8,7 +8,7 @@
   },
   "scripts": {
     "start": "ember server",
-    "startui": "ember server --proxy https://staging-crates-io.herokuapp.com",
+    "start:ui": "ember server --proxy https://staging-crates-io.herokuapp.com",
     "build": "ember build",
     "test": "ember test"
   },