Updated mediawiki/extensions
Project: mediawiki/extensions/UploadWizard  bbbc2ecd2273ab610b81e41d7a853737f19b8c71

Add model base class, description model

This was the tiniest, least intrusive model I could think to start with.

Change-Id: Ie1a897b07346cfb43014b7d6f89addf4d25b2fba