FIXED: Call cliopatria:list_resource//1 again for backward compatibility
reasons.  After comment on 4a03236 by honnix.
IMPROVED: performance multi-lang label handling

Avoid backtracking over labels in alternative languages until one
matches if there is a direct literal language match.
This can get really expensive, for example in EU datasets where each
resource has labels in 23 languages ...
ADDED: Laurens new and flashy YASQE/YASR replacements of YASGUI.
ADDED: /json/prefixes to return a JSON object prefix->URI for the
server.
Use /json/prefixes
ENHANCED: Make YASR results redirect to ClioPatria /browse/list_resource
Put YASGUI first for available SPARQL editors.
Updated YASR
FIXED: YASR make server prefix abbreviation work on `back'.  Laurens Rietveld.
Merge branch 'master' into SPARQL-Update-Fixes