use html-sanitizer instead of html-css

always scrub css (for now)

IPython/html/templates/notebook.html

@@ -291,7 +291,7 b' class="notebook_app"'
 
 {{super()}}
 
-<script src="{{ static_url("components/google-caja/google-caja/html-css-sanitizer-minified.js") }}" charset="utf-8"></script>
+<script src="{{ static_url("components/google-caja/google-caja/html-sanitizer-minified.js") }}" charset="utf-8"></script>
 <script src="{{ static_url("components/codemirror/lib/codemirror.js") }}" charset="utf-8"></script>
 <script type="text/javascript">
     CodeMirror.modeURL = "{{ static_url("components/codemirror/mode/%N/%N.js", include_version=False) }}";