Merging MWKArticle and MWKArticleStore into one object

Generally changing some of the 'dumb' data objects into 'smart' objects and hooking
more things up to MWKArticle and the data store directly.

* thumbnail adjustments
* Fixes needsRefresh handling
* Thumbnails may not show until fix to article queue manager merges!
* Fixed language name in settings
* reduced logspam

Change-Id: Icd19417664d974e8c39767ccb99395346cd3001a