Import translations for Havana 2013.2.2 udpate

* Import the latest translations of ~100% completed languages.
  12 translated languages are avaialable.
* Update POT files (English PO file)

This commit is directly proposed to stable/havana branch because
strings are different between stable/havana and master branches.

Change-Id: I117ea214d121d4c70e8f3679c88d0c758c586f99
Merge branch 'stable/havana' of https://github.com/openstack/horizon into stable/havana_routerrules