Added wrapper for the xmlURIPtr type, provided accessors, fixed the

* python/generator.py python/libxml.c python/libxml2-python-api.xml
  python/libxml2class.txt python/libxml_wrap.h python/types.c:
  Added wrapper for the xmlURIPtr type, provided accessors, fixed
  the accessor generator for strings
* python/tests/Makefile.am python/tests/tstURI.py: added a specific
  regression test.
Daniel

python/libxml2class.txt

@@ -137,7 +137,9 @@ URIEscape()
 URIEscapeStr()
 URIUnescapeString()
 buildURI()
+createURI()
 normalizeURIPath()
+parseURI()
 
 # functions from module xmlIO
 cleanupInputCallbacks()
@@ -506,6 +508,32 @@ Class xmlAttr(xmlNode)
     freeProp()
     freePropList()
     removeProp()
+Class URI()
+    # accessors
+    authority()
+    fragment()
+    opaque()
+    path()
+    port()
+    query()
+    scheme()
+    server()
+    setAuthority()
+    setFragment()
+    setOpaque()
+    setPath()
+    setPort()
+    setQuery()
+    setScheme()
+    setServer()
+    setUser()
+    user()
+
+    # functions from module uri
+    freeURI()
+    parseURIReference()
+    printURI()
+    saveUri()
 Class xpathContext()
     # accessors
     contextDoc()