modified the file header to add more informations, painful... updated to

* include/libxml/*.h include/libxml/*.h.in: modified the file
  header to add more informations, painful...
* genChRanges.py genUnicode.py: updated to generate said changes
  in headers
* doc/apibuild.py: extract headers, add them to libxml2-api.xml
* *.html *.xsl *.xml: updated the stylesheets to flag geprecated
  APIs modules. Updated the stylesheets, some cleanups, regenerated
* doc/html/*.html: regenerated added back book1 and libxml-lib.html
Daniel
diff --git a/include/libxml/tree.h b/include/libxml/tree.h
index 82b757a..cfa95ec 100644
--- a/include/libxml/tree.h
+++ b/include/libxml/tree.h
@@ -1,11 +1,12 @@
 /*
- * tree.h : describes the structures found in an tree resulting
- *          from an XML parsing.
+ * Summary: interfaces for tree manipulation
+ * Description: this module describes the structures found in an tree resulting
+ *              from an XML or HTML parsing, as well as the API provided for
+ *              various processing on that tree
  *
- * See Copyright for the status of this software.
+ * Copy: See Copyright for the status of this software.
  *
- * daniel@veillard.com
- *
+ * Author: Daniel Veillard
  */
 
 #ifndef __XML_TREE_H__