adds element traversal support avoid a warning regenerated daniel

* include/libxml/tree.h tree.c python/generator.py: adds
  element traversal support
* valid.c: avoid a warning
* doc/*: regenerated
daniel

svn path=/trunk/; revision=3804
diff --git a/doc/APIchunk3.html b/doc/APIchunk3.html
index 3f5646a..958aefe 100644
--- a/doc/APIchunk3.html
+++ b/doc/APIchunk3.html
@@ -72,7 +72,12 @@
 <a href="html/libxml-hash.html#xmlHashRemoveEntry3">xmlHashRemoveEntry3</a><br />
 <a href="html/libxml-parser.html#xmlParserFindNodeInfo">xmlParserFindNodeInfo</a><br />
 <a href="html/libxml-parser.html#xmlParserFindNodeInfoIndex">xmlParserFindNodeInfoIndex</a><br />
-</dd><dt>Finds</dt><dd><a href="html/libxml-xmlregexp.html#xmlExpIsNillable">xmlExpIsNillable</a><br />
+</dd><dt>Finds</dt><dd><a href="html/libxml-tree.html#xmlChildElementCount">xmlChildElementCount</a><br />
+<a href="html/libxml-xmlregexp.html#xmlExpIsNillable">xmlExpIsNillable</a><br />
+<a href="html/libxml-tree.html#xmlFirstElementChild">xmlFirstElementChild</a><br />
+<a href="html/libxml-tree.html#xmlLastElementChild">xmlLastElementChild</a><br />
+<a href="html/libxml-tree.html#xmlNextElementSibling">xmlNextElementSibling</a><br />
+<a href="html/libxml-tree.html#xmlPreviousElementSibling">xmlPreviousElementSibling</a><br />
 </dd><dt>First</dt><dd><a href="html/libxml-schemasInternals.html#XML_SCHEMAS_TYPE_FIXUP_1">XML_SCHEMAS_TYPE_FIXUP_1</a><br />
 <a href="html/libxml-entities.html#_xmlEntity">_xmlEntity</a><br />
 </dd><dt>Fixed</dt><dd><a href="html/libxml-parserInternals.html#xmlParseDefaultDecl">xmlParseDefaultDecl</a><br />