tools package marker
doc updates
nonzero for QueryResult objects (for ASK results)
fixed tests for py3
raise exception when trying to add/query for bnodes with sparql(update)store. fixes #276
new sphinx theme, version=4.0-dev
structure to index page;
after one release as deprecated, removed URIRef.concrete, URIRef.abstract. fixes #236
doc updates
more doc updates
Register parsers and serializers with mime-type

Like this it is now possible to use mime-types for the format argument
of Graph.parse and Graph.serialize.
added missing diagram
NTriples: Newline in final line is optional

See http://www.w3.org/TR/2013/NOTE-n-triples-20130409/#grammar-production-ntriplesDoc
Fixing tests wrt. multiply registered parsers and serializers
and even more doc updates
migrated faq from wiki to docs
py3 test fix - again. rdflib.paths doc update
Merge pull request #278 from uholzer/bug-ntriples-eof

NTriples: Newline in final line is optional
Merge pull request #277 from uholzer/register_with_mimetype

Register parsers and serializers with mime-type
mimetype for trix, dont double-test parsers/serializers registered twice - related to #277