JENA-1997
I found an experiment that removed the jena-core Turtle writer.
jena-core need Turtle parsing for it's test suite. The tests don't use
the very old Turtle/N3 subsystem it for writing.
This old Turtle parser/writer isn't compliant with the current Turtle spec.
At the same time, there are several RDFWriterF (factory) methods that
don't make sense when RIOT i sused.
This changes the mode Interface to remove deprecated functionality and
which didn't actually do anything anyway when RIOT was in-use.
The only people who might be affected are those using jena-core without
jena-arq and also who upgrade Jena.
Claude - there are jena-permission changes to match - they are
check+pass-thru's.
Andy
