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/io.json

@@ -40,6 +40,7 @@
   "bundle_modal_error.retry": "Try again",
   "column.blocks": "Blokusita uzeri",
   "column.community": "Lokala tempolineo",
+  "column.direct": "Direct messages",
   "column.domain_blocks": "Hidden domains",
   "column.favourites": "Favorati",
   "column.follow_requests": "Demandi di sequado",
@@ -100,6 +101,7 @@
   "emoji_button.symbols": "Symbols",
   "emoji_button.travel": "Travel & Places",
   "empty_column.community": "La lokala tempolineo esas vakua. Skribez ulo publike por iniciar la agiveso!",
+  "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": "Esas ankore nulo en ta gretovorto.",
   "empty_column.home": "Tu sequas ankore nulu. Vizitez {public} od uzez la serchilo por komencar e renkontrar altra uzeri.",
   "empty_column.home.public_timeline": "la publika tempolineo",
@@ -154,6 +156,7 @@
   "mute_modal.hide_notifications": "Hide notifications from this user?",
   "navigation_bar.blocks": "Blokusita uzeri",
   "navigation_bar.community_timeline": "Lokala tempolineo",
+  "navigation_bar.direct": "Direct messages",
   "navigation_bar.domain_blocks": "Hidden domains",
   "navigation_bar.edit_profile": "Modifikar profilo",
   "navigation_bar.favourites": "Favorati",
@@ -238,6 +241,7 @@
   "search_results.total": "{count, number} {count, plural, one {rezulto} other {rezulti}}",
   "standalone.public_title": "A look inside...",
   "status.block": "Block @{name}",
+  "status.cancel_reblog_private": "Unboost",
   "status.cannot_reblog": "This post cannot be boosted",
   "status.delete": "Efacar",
   "status.direct": "Direct message @{name}",
@@ -253,6 +257,7 @@
   "status.pin": "Pin on profile",
   "status.pinned": "Pinned toot",
   "status.reblog": "Repetar",
+  "status.reblog_private": "Boost to original audience",
   "status.reblogged_by": "{name} repetita",
   "status.reply": "Respondar",
   "status.replyAll": "Respondar a filo",