Add a copy of FancyGrid's logo (vuejs#858)

Author: TETRA2000

src/images/fancygrid.png

@@ -36,7 +36,7 @@
   <img src="<%- url_for("/images/tmvuejs2.png") %>">
 </a>
 <a href="https://fancygrid.com" target="_blank" style="width:110px;">
-  <img src="https://fancygrid.com/logo/logo.png" style="width:110px">
+  <img src="<%- url_for("/images/fancygrid.png") %>" style="width:110px">
 </a>
 <a href="https://component.io" target="_blank" style="width:120px;top:1px">
   <img src="<%- url_for("/images/component_io.png") %>" style="width:120px">