Use latest version of badge.png for footer. Fix auth0#13

This version of bade.png it's already compressed

Author: ramasilveyra

lib/footer/demo.jade

@@ -1,7 +1,7 @@
 footer.site-footer
   .container
     .logo
-      img(src="https://cdn.auth0.com/styleguide/1.0.0/img/badge.png", width="30")
+      img(src="https://cdn.auth0.com/styleguide/latest/lib/logos/img/badge.png", width="30")
 
     .footer-grid
       .column