Use Config instead of globals, part #1

Converts most usages of globals, still a few left that
are in static functions.

Change-Id: I792c828349589f6d36ecaf43b298512aa7e47128
Remove unused GlobalUserPage::isSourcePage()

Change-Id: Icc2c93e5633b453631ddec4d5ba7db8f3c2cb727
Clean up SkinTemplateNavigationUniversal hook

Bug: 70506
Change-Id: I4ab0966f326e7af89d151f608bb9ce27ecad24f4
Generalize all ShoutWiki-specific messages

Change-Id: Id5101e7f2e0de34bb8c89caf3bfd8de7373f188f
Remove unused qqq keys

Change-Id: Idf3e973d6e0733be878c835e3a763ce95aa5dbed