initial commit of ios 'learn more' page

created a [Learn More [screenshot]](https://www.dropbox.com/lightbox/home/Public) iOS page similar to [Android](http://staging.aerogear.org/docs/guides/aerogear-android/) in which:

- extracted sections from the cookbook guide into their own page and added links on those.
- getting started guides (iOS and xcode template) and added links to them
- added links to the various example apps

done for [AGIOS-141](https://issues.jboss.org/browse/AGIOS-141)