Move/rename files for consistency

Main parts are:

+ smw.Api -> handles topics related to Ajax/Parsing
+ smw.Query -> handles topics related to query and descriptions
+ smw.Store -> handles topics related to cache and indexedDB support
+ smw.Data -> handles topics related to dataItems and dataValues

Change-Id: Ifd9779eb3d26b4e5d28777cc0dca06790267a594
Merge "Move/rename files for consistency"