Updated docs and VERSION for 1.010_01 beta release.
Updated Hexastore store to return an empty iterator for get_contexts() instead of croaking.
Merge branch 'master' into rdf-trine-1.011
Updated docs and VERSION for 1.010_01 beta release.
Fix test suite to expect that get_contexts always succeed, even for triplestores.
Fix bug in handling of SUM aggregates with non-literal data.
Updated docs and VERSION for 2.911_01 beta release.
Fixed typo in Makefile.PL.
Updated docs and VERSION for 1.011 release.
Merge branch 'rdf-trine-1.011' into release-rdf-trine
Merge tag 'rdf-trine-1.011'

RDF::Trine 1.011.
Updated docs and VERSION for 2.912 release.
Merge branch 'master' into rdf-query-2.912
Merge branch 'rdf-query-2.912' into release-rdf-query
Merge tag 'rdf-query-2.912'

RDF::Query 2.912.
Fixed SPARQL XML serialization of boolean results.
Fixed whitespace handling bug during parsing of VALUES clauses (github issue #120).
Improve coverage of as_hash function for variable bindings and expressions (github issue #121).
Merge upstream