Updated mediawiki/extensions
Project: mediawiki/extensions/CategoryTree  1f6df56a60d7b29346609d03bfdef0b220f3098a

Migrate to JSON i18n

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

Add a file to .jshintignore to not make Jenkins block on something that's
not related to this patch set.

Change-Id: I9331d328746281a2eb7ec1317d557e8fd7931d74