Fixed convert if arg is rdf box
Fixed "too many open statements" error in jena provider
Rebuild driver
Fixed check for attempting to move graph to itself.
Fixed issue with FILTER (isURI(?resourceUri)) code generation
Added wdrs namespace
Removed dead links
Fixed issue with /resource links
Fixed rewrite rules

* Added support for ld+json
* Added support for text/turtle
* Added alias for .rdf
Updated vad version to 1.4.18
Fixed missing check for jsld format
Fixed variable should be initialized before used by sas_init
Replaced top level @id with @graph in ld-json output
Fixed suppress Content-Type header on json output
Fixed issue with lost joings on rewriting of unions

* sparql_gp_detach_all_filters is extended with ability to extract
  detached filters from equivs
Fixed support of triple patterns of subtype OPTIONAL_L
Fixed missing initialization of variable
Fixed extraction of equiv restrictions as filters
Added optimization for faster (re)creation of RDF View
Added support for negative year