Updated distiller plus some new tests

Having read the minutes of yesterday's meeting[1] I have updated the 
RDFa distiller. I believe it implements the XMLLiteral as described in 
the minutes.

There are also some, independent improvements: I have made some 
improvements on the RDF/XML and Turtle serializations (I had to hack 
into the serialization module of RDFLib which was buggy here and there 
and produced a fairly ugly turtle output:-(

Most importantly, however, I propose four more test cases (attached in 
the tar file) on XML Literals. There is a description of the test goals 
in each of the xhtml files.

Happy Easter, week-end, etc, everyone!

Ivan



[1] http://www.w3.org/2008/03/20-rdfa-minutes.html
-- 

Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
PGP Key: http://www.ivan-herman.net/pgpkey.html
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