provision transparency.wikimedia.org

* Hosted on Zirconium (which already hosts similar static sites, like
  http://planet.wikimedia.org/, etc.)
* Served by misc-varnish.
* Deployed via Git. (It's a static site.)

RT: 7845
Change-Id: I904f5fc8115ef607202616b985645c7d3e6a2bc3