Add Dailymotion embedding.

src/General/Config.coffee

@@ -133,7 +133,7 @@ Config =
       ]
       'Link Title': [
         true
-        'Replace the link of a supported site with its actual title. Currently supported: YouTube, Vimeo, SoundCloud, and Github gists.'
+        'Replace the link of a supported site with its actual title. Currently supported: YouTube, Vimeo, Dailymotion, SoundCloud, and Github gists.'
         1
       ]
       'Embedding': [

src/Linkification/Embedding.coffee

@@ -173,6 +173,17 @@ Embedding =
           controls:    true
           preload:     'auto'
           src:         a.dataset.href
+    ,
+      key: 'Dailymotion'
+      regExp:  /^\w+:\/\/(?:(?:www\.)?dailymotion\.com\/(?:embed\/)?video|dai\.ly)\/([A-Za-z0-9]+).*((?:\?.*)?)/
+      style: 'border: none; width: 640px; height: 360px;'
+      el: (a) ->
+        options = if (start = a.dataset.options.match /[?&](start=\d+)/) then "?#{start[1]}" else ''
+        $.el 'iframe',
+          src: "//www.dailymotion.com/embed/video/#{a.dataset.uid}#{options}"
+      title:
+        api: (uid) -> "https://api.dailymotion.com/video/#{uid}"
+        text: (_) -> _.title
     ,
       key: 'Gist'
       regExp: /^\w+:\/\/gist\.github\.com\/(?:[\w\-]+\/)?(\w+)/