link cdn to unminified file closes #695. also moving back to cdnjs.com because it gives better usage stats

Author: lmccart

src/templates/pages/download/index.hbs

@@ -79,7 +79,7 @@ slug: download/
           </li>
 
           <li>
-            <a class='support_link p5_link' href="https://cdn.jsdelivr.net/npm/p5@[p5_version]/lib/p5.min.js" target="_blank">
+            <a class='support_link p5_link' href="https://cdnjs.com/libraries/p5.js" target="_blank">
               <div class="download_box half_box last_box">
                 <span class="download_name">CDN</span>
                 <p>{{#i18n "link"}}{{/i18n}}

src/templates/pages/get-started/index.hbs

@@ -29,17 +29,17 @@ slug: get-started/
         <pre><code class="language-markup">&lt;script src="../p5.min.js">&lt;/script></code></pre>
 
         <p>{{#i18n "download5"}}{{/i18n}}
-          <a target="_blank" href="https://cdn.jsdelivr.net/npm/p5/lib/">
+          <a target="_blank" href="https://cdnjs.com/libraries/p5.js">
             p5.js CDN</a>{{#i18n "download6"}}{{/i18n}}
         </p>
 
-        <pre class='p5-replace'><code class="language-markup">&lt;script src="https://cdn.jsdelivr.net/npm/p5@[p5_version]/lib/p5.js">&lt;/script></code></pre>
+        <pre class='p5-replace'><code class="language-markup">&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/[p5_version]/lib/p5.js">&lt;/script></code></pre>
 
         <p>{{#i18n "download7"}}{{/i18n}}</p>
 
         <pre class='p5-replace'><code class="language-markup">&lt;html>
   &lt;head>
-    &lt;script src="https://cdn.jsdelivr.net/npm/p5@[p5_version]/lib/p5.js">&lt;/script>
+    &lt;script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/[p5_version]/lib/p5.js">&lt;/script>
     &lt;script src="sketch.js">&lt;/script>
   &lt;/head>
   &lt;body>