📝 Update description

This is the offical description that comes up in google for the site :)

package.json

@@ -1,7 +1,7 @@
 {
   "name": "Polymer",
   "version": "1.1.3",
-  "description": "Authors interested in learning the core concepts in 0.8 may be interested in our [primer](https://github.com/Polymer/polymer/blob/0.8-preview/PRIMER.md).",
+  "description": "The Polymer library makes it easy to create your own web components. Give your element some markup and properties, and then use it on a site. Polymer provides features like dynamic templates and data binding to reduce the amount of boilerplate you need to write",
   "main": "polymer.html",
   "directories": {
     "doc": "docs",