added more informations in the libxml2-python package including docs.

* configure.in libxml.spec.in python/Makefile.am python/TODO
  python/generator.py python/libxml2class.txt: added more informations
  in the libxml2-python package including docs. Slightly changed
  the class hierarchy
* python/tests/*: added basic regression tests infrastructure too
Daniel

python/tests/tstxpath.py

@@ -0,0 +1,29 @@
+#!/usr/bin/python -u
+import libxml2
+
+def foo(x):
+    # print "foo called %s" % (x)
+    return x + 1
+
+def bar(x):
+    # print "foo called %s" % (x)
+    return "%s" % (x + 1)
+
+doc = libxml2.parseFile("tst.xml")
+ctxt = doc.xpathNewContext()
+res = ctxt.xpathEval("//*")
+print res
+
+libxml2.registerXPathFunction(ctxt._o, "foo", None, foo)
+libxml2.registerXPathFunction(ctxt._o, "bar", None, bar)
+i = 10000
+while i > 0:
+    res = ctxt.xpathEval("foo(1)")
+    i = i - 1
+print res
+i = 10000
+while i > 0:
+    res = ctxt.xpathEval("bar(1)")
+    i = i - 1
+print res
+doc.freeDoc()