Fix typo s/forecase.io/forecase.io/g

Author: ernesto-jimenez

index.html

@@ -575,14 +575,14 @@ <h2>
         interface chrome of a browser - which typically means an web
         application will be launched in full screen. Depending on the OS and
         browser, these opt-in mechanisms can have various side-effects. One
-        such web application, <a href="http://forecase.io">Forecast.io</a>, is
+        such web application, <a href="http://forecast.io">Forecast.io</a>, is
         shown below running in iOS.
       </p>
       <figure>
         <img src="images/ios_integration.jpg" alt="">
         <figcaption>
           The figure shows how the <cite><a href=
-          "http://forecase.io">Forecast.io</a></cite> web application
+          "http://forecast.io">Forecast.io</a></cite> web application
           integrates with iOS 7's task switcher. Note also the web
           application's launch icon is indistinguishable from those of other
           applications.