Fix web site encoding problems

The encoding.html page was generated incorectly, revamp the input
xml.html and convert the full XSLT chain to use and serve it as
UTF-8
* doc/*: fix xml.html, update all stylesheets and regenerate
diff --git a/doc/html/libxml-xmlreader.html b/doc/html/libxml-xmlreader.html
index f010f65..6492a6d 100644
--- a/doc/html/libxml-xmlreader.html
+++ b/doc/html/libxml-xmlreader.html
@@ -1,6 +1,6 @@
-<?xml version="1.0" encoding="ISO-8859-1"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /><link rel="SHORTCUT ICON" href="/favicon.ico" /><style type="text/css">
+<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="SHORTCUT ICON" href="/favicon.ico" /><style type="text/css">
 TD {font-family: Verdana,Arial,Helvetica}
 BODY {font-family: Verdana,Arial,Helvetica; margin-top: 2em; margin-left: 0em; margin-right: 0em}
 H1 {font-family: Verdana,Arial,Helvetica}
@@ -296,7 +296,7 @@
 </pre><p>Reads the contents of the current node, including child nodes and markup.</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>reader</tt></i>:</span></td><td>the <a href="libxml-xmlreader.html#xmlTextReaderPtr">xmlTextReaderPtr</a> used</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a string containing the XML content, or NULL if the current node is neither an element nor attribute, or has no child nodes. The string must be deallocated by the caller.</td></tr></tbody></table></div><h3><a name="xmlTextReaderReadOuterXml" id="xmlTextReaderReadOuterXml"></a>Function: xmlTextReaderReadOuterXml</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	xmlTextReaderReadOuterXml	(<a href="libxml-xmlreader.html#xmlTextReaderPtr">xmlTextReaderPtr</a> reader)<br />
 </pre><p>Reads the contents of the current node, including child nodes and markup.</p>
-<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>reader</tt></i>:</span></td><td>the <a href="libxml-xmlreader.html#xmlTextReaderPtr">xmlTextReaderPtr</a> used</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a string containing the XML content, or NULL if the current node is neither an element nor attribute, or has no child nodes. The string must be deallocated by the caller.</td></tr></tbody></table></div><h3><a name="xmlTextReaderReadState" id="xmlTextReaderReadState"></a>Function: xmlTextReaderReadState</h3><pre class="programlisting">int	xmlTextReaderReadState		(<a href="libxml-xmlreader.html#xmlTextReaderPtr">xmlTextReaderPtr</a> reader)<br />
+<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>reader</tt></i>:</span></td><td>the <a href="libxml-xmlreader.html#xmlTextReaderPtr">xmlTextReaderPtr</a> used</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a string containing the node and any XML content, or NULL if the current node cannot be serialized. The string must be deallocated by the caller.</td></tr></tbody></table></div><h3><a name="xmlTextReaderReadState" id="xmlTextReaderReadState"></a>Function: xmlTextReaderReadState</h3><pre class="programlisting">int	xmlTextReaderReadState		(<a href="libxml-xmlreader.html#xmlTextReaderPtr">xmlTextReaderPtr</a> reader)<br />
 </pre><p>Gets the read state of the reader.</p>
 <div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>reader</tt></i>:</span></td><td>the <a href="libxml-xmlreader.html#xmlTextReaderPtr">xmlTextReaderPtr</a> used</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the state value, or -1 in case of error</td></tr></tbody></table></div><h3><a name="xmlTextReaderReadString" id="xmlTextReaderReadString"></a>Function: xmlTextReaderReadString</h3><pre class="programlisting"><a href="libxml-xmlstring.html#xmlChar">xmlChar</a> *	xmlTextReaderReadString	(<a href="libxml-xmlreader.html#xmlTextReaderPtr">xmlTextReaderPtr</a> reader)<br />
 </pre><p>Reads the contents of an element or a text node as a string.</p>