Add user tripcodes

Users can separate their name and a password with ## to create the
illusion of consistent posting.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/static/board/style.css

@@ -2,7 +2,9 @@
     --body: #ededed;
     --highlight: #555;
     --border-color: #555;
+    --name: #060;
     --quote: #595;
+    --subject: #333;
     --activated: #888;
     --post-background: #d9d9d9;
     --reply-background: #eee;
@@ -102,13 +104,19 @@ th {
 }
 
 .post_subject {
+    color: var(--subject);
     font-weight: bold;
 }
 
 .post_name {
+    color: var(--name);
     font-weight: bold;
 }
 
+.post_tripcode {
+    color: var(--name);
+}
+
 .post_stats {
     float: right;
 }