* master: (44 commits)
quote cleanup OCD
serializer/parser alias for 'ntriples'
serializer/parser alias for 'ttl'
cleanup
remove outdated always skipped test
a bit of changelog
add a NTSerializer sub-class for nt11 (#700)
Restrict normalization to unicode-compatible values (#674)
fixes for turtle/trig namespace handling
skip serialising empty default graph
skip round-trip test, unfixable until 5.0
prefix test for #428
Added additional trig unit tests to highlight some currently occurring issues.
remove ancient and broken 2.3 support code. (#681)
updating deprecated testing syntax (#697)
docs: clarify the use of an identifier when persisting a triplestore (#654)
removing pyparsing version requirement (#696)
made min/max aggregate functions support all literals (#694)
actually fix projection from sub-queries
added dawg tests for #607
...