PassByClue: Fix matching clues with regex-special meta characters
(cherry picked from commit a586fe6e65d47126aa692d2529c4b7c9ace9e94e)
README.md: Design Considerations -> Development Notes

Later, we will split this to a different file.
DBpediaTitles: Query typo fix
CachedJenaLookup: When endpoint returns HTTP error, keep retrying
CachedJenaLookup: Switch default SPARQL endpoint from dbpedia.org to pasky.or.cz
Merge branch 'master' into mlscoring

Conflicts:
	README.md
PassGSHook: Separate set of passages within each document with an empty line