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 1.011 release.
Merge branch 'rdf-trine-1.011' into release-rdf-trine
Merge tag 'rdf-trine-1.011'

RDF::Trine 1.011.