licenses -> license in bower.json

bower.json

@@ -8,12 +8,7 @@
     "type": "git",
     "url": "git://github.com/thomaspark/bootswatch.git"
   },
-  "licenses": [
-    {
-      "type": "MIT",
-      "url": "https://github.com/thomaspark/bootswatch/blob/gh-pages/LICENSE"
-    }
-  ],
+  "license": "MIT",
   "ignore": [
     "2",
     "api",