added opengraph meta data

Author: timatooth

public/screenshot.png

@@ -3,6 +3,13 @@ html
   head
     title Tim's Multiplayer Draw App
     meta(name="viewport" content="initial-scale=1")
+    meta(name="description" content="Draw with everyone else in realtime on a HTML5 canvas")
+    meta(property="og:url" content="http://draw.timatooth.com")
+    meta(property="og:title" content="Multiplayer Draw")
+    meta(property="og:image" content="http://draw.timatooth.com/screenshot.png")
+    meta(property="og:image:width" content="1600")
+    meta(property="og:image:height" content="1000")
+    meta(property="og:description" content="Draw with everyone else online in realtime!")
     link(rel="stylesheet" href="style.min.css")
   body
     div#colourPanel