Normalize language tags in RDF::Trine::Node::Literal->new.
Removed debugging code in RDF::Trine::Node::Literal.
Use normalized langauge tags in RDF::Trine::Node::Literal->new.
Fixed bug in constructing the HTTP request object for SPARQL updates.
Merge branch 'feature-langtag-normalize'

Conflicts:
	RDF-Trine/lib/RDF/Trine/Store/SPARQL.pm