Add definitive credit for Vue.js

website/themes/uppy/layout/index.ejs

@@ -134,7 +134,8 @@
 <div id="footer">
   <a class="start" href="/guide/index.html">Get Started</a>
   <p>Released under the <a href="http://opensource.org/licenses/MIT" target="_blank">MIT License</a></p>
-  <p>Copyright (c) <%- date(Date.now(), 'YYYY') %> <a href="http://transloadit.com" target="_blank">Transloadit</a></p>
+  <p>This site borrows heavily from Evan You's excellent <a href="https://github.com/vuejs/vuejs.org">Vue.js</a> (<a href="https://github.com/transloadit/uppy/blob/master/website/LICENSE">LICENSE</a>)</p>
+  <p>Copyright (c) <%- date(Date.now(), 'YYYY') %> <a href="https://transloadit.com" target="_blank">Transloadit</a></p>
 </div>
 
 <!-- Twitter follow button script -->