added more methods of XmlTextReader. this increased the methods in the

* xmlreader.c include/libxml/xmlreader.h doc/libxml2-api.xml: added
  more methods of XmlTextReader.
* python/libxml2class.txt python/tests/reader.py: this increased the
  methods in the bndings, augmented the test to check those new
  functions.
Daniel
6 files changed