API doc for aerogear-ios release
Merge branch 'pr/201'

closes #201
Initial description for aerogear-crypto spec
Initial description for iOS section
Inclusion of the author
Document formatting
Local data encryption first
update iOS section based on latest meeting
Adding hint on syn/async enc.
A note about local data encryption
Updating references for images
Application demo workflow
Inclusion of working reference
updating iOS API documentation for symmetric encryption
clean spec removing meetings notes add implementation details
Moving the specification to a new folder
Updating the crypto specification
fix formatting nit
Merge branch 'pr/197'

closes #197