A new development branch
Cleaned up interface and promoted it to SIR: Simple Interface
for RDF.
Updated parser to use SAX2 interfaces instead of using expat directly.
Added BTreeTripleStore, a ZODB BTree TripleStore backend. And
a default pre-mixed TripleStore that uses it.
Synced with latest (Editor's draft) RDF/XML spec.
Added datatype support.
Cleaned up interfaces for load/parse: removed generate_path
from loadsave and renamed parse_URI to parse.