Proper include to W3TCs nginx.conf in WP-root - fixes #9

This is an `include` to W3TCs edit-able nginx.conf file at WP-root.
Now all settings can be dynamically configured from W3TC’s WP-backend
admin panel.
The issue was not with my new `include` reference to W3TC’s editable
nginx.conf, at WordPress root, in the main VHost, but with W3TC
settings themselves as they were in its old nginx.conf file.  This
fixes #9 but we still need to configure W3TC to work optimally.

root/etc/nginx/sites-available/earmilk.com.conf

@@ -23,7 +23,7 @@ server {
         rewrite /wp-admin$ $scheme://$host$uri/ permanent;
 
         # Include W3TC's editable nginx.conf file in WordPress root
-        # include /home/www-data/earmilk/public/nginx.conf;
+        include /home/www-data/earmilk/public/nginx.conf;
 
         location ~* \.(png|gif|jpg|jpeg)$ {
             error_page 404 http://images.earmilk.com/delivery.png;