Moved example into its own folder

--HG--
rename : docs/htmlify/example.xml => docs/htmlify/to_xml_example/example.xml
rename : docs/htmlify/minus.gif => docs/htmlify/to_xml_example/minus.gif
rename : docs/htmlify/output.xml => docs/htmlify/to_xml_example/output.xml
rename : docs/htmlify/plus.gif => docs/htmlify/to_xml_example/plus.gif
rename : docs/htmlify/stylesheet.xsl => docs/htmlify/to_xml_example/stylesheet.xsl
rename : docs/htmlify/test.cpp => docs/htmlify/to_xml_example/test.cpp
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403729