Lots of stuff hooking up markdown to dartdoc.

utils/dartdoc/static/styles.css

Index: utils/dartdoc/static/styles.css
diff --git a/utils/dartdoc/static/styles.css b/utils/dartdoc/static/styles.css
index a3b2fa9cdc5c2a03ce4c39afdd7b8f6716d8d9f0..21352d5d1372e487e632fb4a3a267951324507e2 100644
--- a/utils/dartdoc/static/styles.css
+++ b/utils/dartdoc/static/styles.css
@@ -92,6 +92,28 @@ hr + h2 {
   padding-left: 44px;
 }
 
+.param {
+  font: 600 14px/22px 'Open Sans', 'Lucida Sans Unicode', 'Lucida Grande',
+      sans-serif;
+}
+
+.crossref {
+  font: 600 15px/22px 'Open Sans', 'Lucida Sans Unicode', 'Lucida Grande',
+      sans-serif;
+}
+
+.doc h1 {
+  font: 700 17px/22px 'Open Sans', 'Lucida Sans Unicode', 'Lucida Grande',
+      sans-serif;
+  color: #666;
+}
+
+.doc h2 {
+  font: 600 16px/22px 'Open Sans', 'Lucida Sans Unicode',
+      'Lucida Grande', sans-serif;
+  color: #666;
+}
+
 /* Highlight members on hover so you can see which docs are for which member. */
 .method:hover,
 .field:hover {