Direct messages column (#4514)

* 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

* Changes to match other timelines in 2.0

app/javascript/mastodon/locales/zh-TW.json

@@ -40,6 +40,7 @@
   "bundle_modal_error.retry": "重試",
   "column.blocks": "封鎖的使用者",
   "column.community": "本地時間軸",
+  "column.direct": "Direct messages",
   "column.domain_blocks": "隱藏域名",
   "column.favourites": "最愛",
   "column.follow_requests": "關注請求",
@@ -100,6 +101,7 @@
   "emoji_button.symbols": "符號",
   "emoji_button.travel": "旅遊與地點",
   "empty_column.community": "本地時間軸是空的。公開寫點什麼吧！",
+  "empty_column.direct": "You don't have any direct messages yet. When you send or receive one, it will show up here.",
   "empty_column.hashtag": "這個主題標籤下什麼都沒有。",
   "empty_column.home": "你還沒關注任何人。造訪{public}或利用搜尋功能找到其他用者。",
   "empty_column.home.public_timeline": "公開時間軸",
@@ -154,6 +156,7 @@
   "mute_modal.hide_notifications": "隱藏來自這個使用者的通知？",
   "navigation_bar.blocks": "封鎖的使用者",
   "navigation_bar.community_timeline": "本地時間軸",
+  "navigation_bar.direct": "Direct messages",
   "navigation_bar.domain_blocks": "隱藏的域名",
   "navigation_bar.edit_profile": "編輯用者資訊",
   "navigation_bar.favourites": "最愛",
@@ -238,6 +241,7 @@
   "search_results.total": "{count, number} 項結果",
   "standalone.public_title": "站點一瞥…",
   "status.block": "封鎖 @{name}",
+  "status.cancel_reblog_private": "Unboost",
   "status.cannot_reblog": "此貼文無法轉推",
   "status.delete": "刪除",
   "status.direct": "Direct message @{name}",
@@ -253,6 +257,7 @@
   "status.pin": "置頂到個人資訊頁",
   "status.pinned": "置頂的推文",
   "status.reblog": "轉推",
+  "status.reblog_private": "Boost to original audience",
   "status.reblogged_by": "{name} 轉推了",
   "status.reply": "回應",
   "status.replyAll": "回應這串",