Update TriG parser to track W3C work.
Liberalize the allowable blank node identifiers in RDF::Trine::Node::Blank.
Allow lowercase hex codepoint values in N-Triples escapes RDF::Trine::Parser::NTriples.
Fix handling of relative base and prefix URIs in RDF::Trine::Parser::TriG.
Update Turtle lexer to look for whitespace (instead of a word break) after 'a' when looking for the A token.
Restrict blank node labels to conform with the Turtle grammar.
Add RDF::Trine::Statement::Quad->graph as an alias for RDF::Trine::Statement::Quad->context.
Added initial implementation of TriG serializer.
Added serialization of TriG prefix declarations.
Updated Turtle 2013 test suite files.
Merge branch 'trig' into turtle
Updated Turtle 2013 parser and test suite to track W3C.
Update restriction on blank node labels to conform with the Turtle grammar.
Updated Turtle 2013 test suite to track W3C.
Tweaked exception handling in TriG 2013 test suite harness.
Moved TriG 2013 test suite harness to xt/.
Removed redundant xt/parser-turtle.t.
Marked TriG 2013 tests as TODO while tracking W3C work.
Merge branch 'master' into turtle
s/exists/defined/ in RDF::Trine::Parser->parse_url_into_model.
Work around a XML::Namespace bug in RDF::Trine::Namespace->uri.
Merge branch 'turtle'
Removed old TOOD reasons for now-passing tests in t/parser-turtle-2013.t.