WMF Projects/udp2log/Legacy updates


 * Add banner impressions
 * Fix udp2log
 * Add click rates
 * Pull in landing page logs
 * Redo stats page so that we can easily display more banners at the same time
 * Settle on a documented banner tagging system and integrate it into central notice
 * Possibly remove need to pass tracking id's through paypal
 * Draft rules for content creators so that we can track