Updated mediawiki/extensions
Project: mediawiki/extensions/Hovergallery  377401554ce60dd3f5861899e39990b6021e56eb

Uploading the basic extension files

Basic documentation at https://www.mediawiki.org/wiki/Extension:HoverGallery

Change-Id: I531a72fd793819bc9f8f4912a6365e8808b0b547