Merge pull request brianc#359 from CartoDB/master-produse

Add cartodb.com as production user

Author: brianc

README.md

@@ -98,6 +98,7 @@ If you have a question, post it to the FAQ section of the WIKI so everyone can r
 * [bitfloor.com](https://bitfloor.com)
 * [Vendly](http://www.vend.ly)
 * [SaferAging](http://www.saferaging.com)
+* [CartoDB](http://www.cartodb.com)
 
 _if you use node-postgres in production and would like your site listed here, fork & add it_