Moved GUI files to OpenKitGUI.

At this point, openkit's core can run without any GUI file.
New OKManager delegate working!
iOS6 compatibility.
Cosmetic changes.
API changes in OKAuth.

- Easier integration
Safer code. asserts and null checks
Changed SDK and Server_API version to 2.0
Updated fmdb library.
Using built-in way to store dates in sqllite
UserID always required in login.
Removed unneeded code in OKCrypto.m
Cosmetic changes. objective-c line length: 100