Add virtuoso service
Merge pull request #394 from SemanticMediaWiki/travis-virtuoso

Add virtuoso as service to Travis
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