Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  1606ea5850838dc5ac795e443f8fc5550c74700b

changed namespaces a bit, added license

namespace for data and entity come now directly from
the settings. also a cc-license is added. the license
is not changeable in the settings for now.

Change-Id: Iea1d34372ba30466d8b76a3650c95cfabadc21dd