• (Addition) Ported RDF::Trine::Serializer::RDFXML to
  AtteanX::Serializer::RDFXML (#22).
  
• (Update) Add serialization of SPARQL PREFIX declarations and prefixnames
  when namespaces are set (#53).
  
• (Update) Added Test::Attean::QuadStore->cleanup_store method.
  
• (Update) Added Test::Attean::StoreCleanup role and added store cleanup
  to store tests.
  
• (Update) Changed Attean::TriplePattern->as_quadpattern to delegate to
  Attean::API::TriplePattern->as_quad_pattern.
  
• (Update) Fix overly aggressive code that attempted to turn IRIs into
  prefix names during Turtle serialization.
  
• (Update) Fixed bug in SPARQL parsing of NIL tokens.
  
• (Update) Fixes to POD, test, and metadata issues reported by
  jonassmedegaard (#93, #94, #95, #96).
  
• (Update) Improve Attean::SimpleQueryEvaluator to handle updated algebra
  classes and iterator API.
  
• (Update) Improved test suite (includes #92 from KjetilK, #53).
  
• (Update) Removed AtteanX::RDFQueryTranslator (split into a new package)
  and all other references to RDF::Query.
  
• (Update) Removed default implementation of Attean::API::Term->ebv (now
  required of consumers).
  
• (Update) Serialize SPARQL and Turtle namespace declarations in a stable
  order.
  
• (Update) Updated Attean::API::AbbreviatingParser->base definition to be
  a consumer of Attean::API::IRI.
  
• (Update) Updated Attean::API::SPARQLSerializable->as_sparql to return a
  unicode string, not bytes.