Added a timeline for Direct statuses

* Lists all Direct statuses you've sent and received
* Displayed in Getting Started
* Streaming server support for direct TL

app/javascript/mastodon/actions/compose.js

@@ -128,6 +128,8 @@ export function submitCompose() {
       if (response.data.in_reply_to_id === null && response.data.visibility === 'public') {
         insertOrRefresh('community', refreshCommunityTimeline);
         insertOrRefresh('public', refreshPublicTimeline);
+      } else if (response.data.visibility === 'direct') {
+        dispatch(updateTimeline('direct', { ...response.data }));
       }
     }).catch(function (error) {
       dispatch(submitComposeFail(error));