Fix 626
Merge pull request #627 from SemanticMediaWiki/sparql-virtuoso

Fix #626 special handling of Virtuoso singleton response
Update RELEASE-NOTES.md

[skip ci]
Fix infinite UpdateJob

- Remove GLOBAL state from `SMWSQLStore3Writers::updateRedirects`
- Add `JobQueueDBIntegrationTest::testNoInfiniteUpdateJobsForCircularRedirect`
Fix 618

- Add `SMWQueryParser::isPagePropertyType`
- Add test for `[[Has subobject::<q>[[Area::891.85 kmÂ²]] OR [[Population::2234105||3517424]]</q>]]`