add OSS note links

style/screen.css

@@ -594,6 +594,10 @@ vertical-align	0%		-5%			-10%		-15%		-20%		-25%		-30%
 	content: "\f14c";
 }
 
+.fa-c-note:before {
+	content: "\f0fa";
+}
+
 .fa-c-list:before {
 	content: "\f02d";
 }