Fixed issues:
* unencrypted string and collections won't be shown on encrypted channels
* fixed crash when two clients with difference encryption keys communicate
  over same channel
Merge branch 'encryption'
cl
Merge branch 'master' of https://github.com/pubnub/objective-c
Completed Asana tasks:
* ZD #1723
Merge branch 'master' into zd-1731
Fixed missing letter in if
working on integer overflow solution
implemented suggestied to fix integer overflow
removed redundant code
Merge pull request #7 from pubnub/zd-1731

Zd 1731
Update CHANGELOG
revved lib dir
Create LICENSE
Completed Asana tasks:
* ZD-1763
* ZD #1723
Completed tasks:
* github issue 8
Merge branch 'master' of https://github.com/pubnub/objective-c
Adding Simple Subscribe demo
adding new SimpleSubscribe HOWTO
cleaning up dir structure