add jsCleanComments option to Minify_HTML

i needed Minify_HTML *not* to remove any html comments inside SCRIPT tag, as i happen to have text/x-jquery-tmpl on page, which include conditional comments. here's sample to give the idea out:

    <script id="dgs-header-template" type="text/x-jquery-tmpl">
    <!--[if lt IE 8]><div class="dgs-frame dgs-ie7"/><![endif]--> 
    </script> 

and having jsCleanComments ON would produce invalid html:

    <script id="dgs-header-template" type="text/x-jquery-tmpl">
    [if lt IE 8]><div class="dgs-frame dgs-ie7"/><![endif]
    </script>