Added support for nodeID://t... syntax

Can be used for debugging in order to make more stable outputs
Added support for nodeID://t... syntax
Fixed missing argument to error message
Fixed composing of SPARQL for remote endpoints

if the query contains transitive subqueries and the like, with bnodes in retval lists
Added bif_rowvector_obj_sort()
Fixed issue with WebDAV methods
Fixed missing tests for checkpoint in progress
Fixed missing symbol ref
Added support for _:vt syntax of bnodes in debugging
Fixed proper support of bnodes in http_ttl_value
Added support for 'define output:format "NICE_TTL"'
Fixed issue with T_STEP in transitive query
Fixed issue with T_STEP in transitive query
Fixed issuewith  SQL transitive closure causing incorrect results