Mercury/Article?title=aaa
use RelatedPages class
add some globals
theme -> wikiVariables
some better docs
simplify getArticle entry point
Merge branch 'mercury' into HG-69-Consolidate-API

Conflicts:
	extensions/wikia/MercuryApi/MercuryApiController.class.php
better check if article isKnown
if getArticleDetails throws don't call getTopContributorsPerArticle
        whoa!
abstract getArticleIdFromRequest and use it for getArticle and getArticleComments
Merge pull request #4390 from Wikia/HG-69-Consolidate-API

Hg 69 consolidate api
Merge branch 'mercury' into HG-103-AdEngine