Added button that allows people get built application in their devices from browser

Hey,

I've added 'Install app' button into your README file. Anyone could try your sample application right in browser. Look how it's working!

To learn more, please look at: http://macbuildserver.com/github/opensource/
Merge pull request #9 from macbuildserver/patch-1

Added button that allows people get built application in their devices from browser
Added an optional method to the protocol that is called when the imageview is dismissed
Changed the method name to something more descriptive
Merge pull request #11 from kmonaghan/donedelegate

Added an optional method to the protocol
Merge remote-tracking branch 'autresphere/master'
update podspec