Added Persistence feature
Turned off COUNTLY_DEBUG and added compiler flag when COUNTLY_DEBUG is enabled to prevent unused variable usage.
Merge pull request #22 from nesimtunc/master

Added Persistence feature
Update README for persistence
Updated README for Persistence
Merge README.md
Updated README for Persistence
Merge pull request #24 from nesimtunc/master

Updated README for Persistence
Added podspec