Integrate new tab completion methods

There is now an option to choose which tab completion method to use.
Also, emotes can be tab completed.

templates/channel.pug

@@ -240,6 +240,7 @@ html(lang="en")
     script(id="socketio-js", src=sioSource)
     script(src="/js/data.js")
     script(src="/js/util.js")
+    script(src="/js/tabcomplete.js")
     script(src="/js/player.js")
     script(src="/js/paginator.js")
     script(src="/js/ui.js")

templates/useroptions.pug

@@ -114,6 +114,12 @@ mixin us-chat
       +rcheckbox("us-sendbtn", "Add a send button to chat")
       +rcheckbox("us-no-emotes", "Disable chat emotes")
       +rcheckbox("us-strip-image", "Remove images from chat")
+      .form-group
+        label.control-label.col-sm-4(for="#us-chat-tab-method") Tab completion method
+        .col-sm-8
+          select#us-chat-tab-method.form-control
+            option(value="Cycle options") Cycle options
+            option(value="Longest unique match") Longest unique match
 
 mixin us-mod
   #us-mod.tab-pane