Updated mediawiki/extensions
Project: mediawiki/extensions/CiteThisPage  7c705dbac3ad2f37e0810e2aae970bead0d5681a

Rename to "CiteThisPage", make Special:CiteThisPage the primary location

Also remove vestiges of the Cite extension from when this used to live in
the same repo.

Change-Id: I17dfad706d46afb452e8ff29140834174470b398