~ promote unordered result set to an ordered one when joining  against an ordered one.
~ COUNT(*) of 0 rows evals to 0
~ GROUP_CONCAT of 0 rows evals to ""
+ selfishly ignore EGP files
Merge branch 'sparql11' of https://github.com/ericprud/SWObjects into sparql11

Conflicts:
	lib/ResultSet.cpp
~ in quiet mode, matchig 0 rows returns errors, like ASK