HHVM / Fix Fatal error: Switch statements may only contain one default

Fatal error: Switch statements may only contain one default:
clause in /home/travis/build/SemanticMediaWiki/mw/extensions/SemanticMediaWiki/includes/src/SPARQLStore/Exception/BadHttpDatabaseResponseException.php on line 72

Failed on VM 3.3.0-dev+2014.08.12 (rel); Did work on VM 3.3.0-dev+2014.08.10
Simplify FQN
Remove profiler calls
Tidy SMWDescription

- Split to own files
- Move to SMW\Query\Language\*
- Improve test coverage
Merge pull request #492 from SemanticMediaWiki/tidy-description

Tidy SMWDescription
Merge pull request #490 from SemanticMediaWiki/profile

Remove profiler calls
Merge pull request #488 from SemanticMediaWiki/hhvm

HHVM / Fix Fatal error: Switch statements may only contain one default
Merge branch 'master' of ssh://wmfgerrit/mediawiki/extensions/SemanticMediaWiki