Merge pull request #385 from pycom/youtube_div

Youtube format div-layout

Author: Catalin Ioana

layouts/shortcodes/youtube.html

@@ -0,0 +1,7 @@
+<div class="responsive-embed widescreen">
+<div class="embed video-player">
+    <iframe class="youtube-player" type="text/html" width="640" height="385"
+            src="https://www.youtube.com/embed/{{ index .Params 0 }}" start="{{ index .Params 1 }}" allowfullscreen frameborder="0">
+    </iframe>
+</div>
+</div>