Add COPYING

Change-Id: Ie17bacc6f606bd4dfc5a56b974b375b852464a66
Localisation updates from https://translatewiki.net.

Change-Id: Ib66cbe0d814999963fb85136d9f23b26bccd9975
Merge "Add COPYING"
Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: I91ed16e6835a1a264a21184ce17bee0bb85c5bf7
Merge changes from master into wip/editorcampaigns

Change-Id: Idf693da4775754217ccd8628c06edcdcfd5ee5d4