Update the temporary global replacement for wgDataValues

Using an array as was done before is needed to allow
Wikibase to add its EntityIdValue to the list.

Change-Id: I9efaa2910ebee58f1a59ac17077ae9c17a093ce3
Add @deprecated tags in Aliases.php

Change-Id: I2829e3e76f765bc9168a5077b4d1066adfb53d5f
Merge pull request #3 from wmde/ghh

Address some issues uncovered in CR