add embedded screencast

Should not matter, this code snippet is generated by YouTube , I just copied and pasted it.

Envoyé de mon iPhone

> Le 19 sept. 2014 à 16:19, Corinne Krych <notifications@github.com> a écrit :
> 
> In push/index.html:
> 
> > @@ -6,7 +6,7 @@
> >  <h2>AeroGear Push</h2>
> >  <p>AeroGear has support for different push notification technologies. The SimplePush server represents an implementation of Mozilla's SimplePush specification, while the UnifiedPush server offers a unified way to deliver push notifications to multiple push networks.</p>
> >  <p>If you have any questions, feel free to hit us up on the mailing list or on irc.</p>
> > -
> > +<p><center><iframe width="560" height="315" src="//www.youtube.com/embed/-hh-sEesocs" frameborder="0" allowfullscreen></iframe></center></p>
> dont' you missed http?
> in src
> 
> —
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