Merge pull request #191 from maxmind/greg/new-user-type

Document consumer_privacy_network user type

Author: horgh

src/Record/Traits.php

@@ -97,6 +97,7 @@
  *    <li>cafe
  *    <li>cellular
  *    <li>college
+ *    <li>consumer_privacy_network
  *    <li>content_delivery_network
  *    <li>dialup
  *    <li>government