[Refs #15] add @ in front of users

cli/ui.js

@@ -112,7 +112,9 @@ function createMessageDom(channelId, msg) {
                 if (type === '@') {
                     if (!sub[1]) {
                         var user = SLACK.context.getMember(sub[0]);
-                        sub[1] = user ? user.name : "Unknown member"; // TODO locale
+                        sub[1] = user ? ('@' +user.name) : "Unknown member"; // TODO locale
+                    } else if ('@' !== sub[1][0]) {
+                        sub[1] = '@' +sub[1];
                     }
                     sub[0] = '#' +sub[0];
                     sub[2] = R.klass.msg.link +' ' +R.klass.msg.linkuser;