apply a basic style to #l_holder

lobste.rs is overriding this in local.css but at least other sites
can get a basic thing there.

mention in README that local css should go into a directory.

README.md

@@ -78,6 +78,8 @@ in a `config/initializers/production.rb` or similar file:
           
           Rails.application.routes.default_url_options[:host] = Rails.application.domain
 
+* Put your site's custom CSS in `app/assets/stylesheets/local`.
+
 * Seed the database to create an initial administrator user and at least one tag:
 
           lobsters$ rake db:seed

app/assets/stylesheets/application.css

@@ -273,6 +273,17 @@ div#inside {
 	text-decoration: none;
 }
 
+#l_holder {
+	background-position: center;
+	float: left;
+	display: block;
+	width: 16px;
+	height: 16px;
+	padding: 1px;
+	margin-left: 4px;
+	margin-right: 11px;
+}
+
 #headertitle {
 	padding-right: 0.75em;
 }