[e] (0) make the domintro warning boxes less like .issue boxes

Fixing http://www.w3.org/Bugs/Public/show_bug.cgi?id=9154

git-svn-id: http://svn.whatwg.org/webapps@4895 340c8d12-0b0e-0410-8428-c7bf67bfef74

index

@@ -151,8 +151,8 @@
    .details-example img { vertical-align: top; }
 
   </style><style>
-   .domintro:before { display: table; margin: -1em -0.5em -0.5em auto; width: auto; content: 'This box is non-normative. Implementation requirements are given below this box.'; color: red; border: solid 2px; background: white; padding: 0 0.25em; }
-  </style><link href=data:text/css, id=complete rel=stylesheet title="Complete specification"><link href=data:text/css,.impl%20{%20display:%20none;%20}%0Ahtml%20{%20border:%20solid%20yellow;%20}%20.domintro:before%20{%20display:%20none;%20} id=author rel="alternate stylesheet" title="Author documentation only"><link href=data:text/css,.impl%20{%20background:%20%23FFEEEE;%20} id=highlight rel="alternate stylesheet" title="Highlight implementation requirements"><link href=status.css rel=stylesheet><script>
+   .domintro:before { display: table; margin: -1em -0.5em -0.5em auto; width: auto; content: 'This box is non-normative. Implementation requirements are given below this box.'; color: black; font-style: italic; border: solid 2px; background: white; padding: 0 0.25em; }
+  </style><link href=data:text/css, id=complete rel=stylesheet title="Complete specification"><link href=data:text/css,.impl%20{%20display:%20none;%20}%0Ahtml%20{%20border:%20solid%20yellow;%20}%20.domintro:before%20{%20display:%20none;%20} id=author rel="alternate stylesheet" title="Author documentation only"><link href=data:text/css,.impl%20{%20background:%20%23FFEEEE;%20}%20.domintro:before%20{%20background:%20%23FFEEEE;%20} id=highlight rel="alternate stylesheet" title="Highlight implementation requirements"><link href=status.css rel=stylesheet><script>
    function init() {
      if (location.search == '?slow-browser')
        return;