Added the MinimalMainPage extension which removes a large portion of the...

... main page chrome in order to allow more space on promotional wikis. This is designed for use mainly by wikis that Wikia creates to promote Wikia functionality. It will soon be toggleable by the wgEnableMinimalMainExt Wikifactory variable. Ads can be suppressed on the MinimalMainPage by setting wgMinimalMain_hideAds to true in Wikifactory.
Our current style guidelines recommend spacing around if conditionals as well as space padding within conditionals and function calls.  Line 14 is an example of this, while lines 11, 22 and 27 can be updated.