Added iTunes link

static/redditbar/index.html

                     <a class="right carousel-control" href="#carousel" data-slide="next"></a>
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                 <p class="lead">Quickly open Reddit links and get notified about new PMs, right from your Mac system menu bar.</p>
-                <p><a href="#"><img src="badge.svg" alt="App Store Badge"></a></p>
+                <p><a href="https://itunes.apple.com/us/app/redditbar/id787870887?ls=1&mt=12"><img src="badge.svg" alt="App Store Badge"></a></p>
                 <p class="small text-muted">Requires Mac OS X 10.8 or newer</p>
             </div>
             <div class="row marketing">