Adding start of query interface.
Query engine skeleton
Bugfix: Get proper version when querying
Exact match queries
Querying from js
Merge remote-tracking branch 'origin/refactor_handlers' into jsonqueries
Removed graph from postgres, and from python libraries.
Fix objstore json query to not use graph uris.
Fix minor bugs with removing graphs
Fixed version number issue with objectstore async and fixed test script
Fix query test script
Finalise test query script, and remove obsolete test script
Properly handle obsolete versions (errbacks)
New test client supports creating, listing, adding to boxes
Make adding confirmation prettier.
New box action "get_object_ids" added to box and to test tool.
Rename "store.add" to store.replace
Merge branch 'nographs'

Conflicts:
	libs/webbox/objectstore_async.py
	libs/webbox/prefactor/objectstore.py
	libs/webbox/webserver/handlers/box.py