SPARQLStore / Adjust RawResultParser NS

- Move SMWSparqlResultParser to SMW\SPARQLStore\QueryEngine\RawResultParser
- Functionality remains unaltered
- Minor clean-up

PS: The parser needs a general overhaul but that's for another PR
Merge pull request #395 from SemanticMediaWiki/sparql-parser

SPARQLStore / Adjust RawResultParser NS