Merge branch 'dz-improve-help-page' into 'master'

Add wiki css to help page

See merge request gitlab-org/gitlab-ce!15488

app/assets/stylesheets/pages/help.scss

-.documentation-index {
-  h1 {
-    margin: 0;
-  }
-
-  h2 {
-    font-size: 20px;
-  }
-
-  li {
-    line-height: 24px;
-    color: $document-index-color;
-
-    a {
-      margin-right: 3px;
-    }
-  }
-}
-
-
 .shortcut-mappings {
   font-size: 12px;
   color: $help-shortcut-mapping-color;

app/views/help/index.html.haml

@@ -29,7 +29,7 @@
 
 .row.prepend-top-default
   .col-md-8
-    .documentation-index
+    .documentation-index.wiki
       = markdown(@help_index)
   .col-md-4
     .panel.panel-default