Add multiline chat message support

app/index.html

@@ -546,8 +546,10 @@
           </div>
         </div>
         <form data-bind="submit: submitMessageBox">
-          <input id="message-box" type="text" data-bind="
+          <textarea id="message-box" row=1 data-bind="
-              attr: { placeholder: messageBoxHint }, textInput: messageBox">
+              attr: { placeholder: messageBoxHint }, 
+              textInput: messageBox, 
+              event: {keypress: submitOnEnter}"></textarea>
         </form>
       </div>
       <script type="text/html" id="channel">

app/index.js

@@ -327,6 +327,14 @@ class GlobalBindings {
       }
     })
 
+    this.submitOnEnter = function(data, e) {
+      if (e.which == 13) {
+       this.submitMessageBox();
+       return false;
+      }
+      return true;
+    }
+
     this.toggleToolbarOrientation = () => {
       this.toolbarHorizontal(!this.toolbarHorizontal())
       this.settings.toolbarVertical = !this.toolbarHorizontal()
@@ -791,10 +799,12 @@ class GlobalBindings {
           target = target.channel()
         }
         // Avoid blank message
-        message = sanitize(message).trim()
+        if (sanitize(message).trim().length == 0) return;
-        if (message.length == 0) return;
+        // Support multiline
+        message = message.replace(/\n\n+/g,"\n\n");
+        message = message.replace(/\n/g,"<br>");
         // Send message
-        target.model.sendMessage(message)
+        target.model.sendMessage(anchorme(message))
         if (target.users) { // Channel
           this.log.push({
             type: 'chat-message-self',