Add support for Markdown with syntax highlighting

Website/wwwroot/css/blog.less

@@ -1,29 +1,17 @@
 @import "colours.less";
 
-.code {
-    border: 4px solid @control;
-    background: @control2;
+.editor-colors {
+    border: 4px solid #fff;
+    background: #fff;
     border-radius: 4px;
-    margin: 0;
+    margin-bottom: 10px;
     overflow: auto;
+    padding: 6px;
 
-    ol {
-        list-style-position: inside;
-        padding: 0;
+    pre {
         margin: 0;
-    }
-
-    li {
-        background: @control;
-        padding: 1px;
-
-        >div {
-            display: inline;
-        }
-
-        &:nth-child(2n) {
-            background: @control2;
-        }
+        tab-size: 4;
+        -moz-tab-size: 4;
     }
 }