QuickDialog as a iOS Framework

Added a target to build QuickDialog as a iOS Framework.

Integrate QuickDialog in your project is as easy as download the QuickDialog source code, open the QuickDialog project, select the "QuickDialog Framework" target and build it.

The "QuickDialog.framework" will appear in the build directory, into the QuickDialog project folder.

Generate following this awesome instructions:
https://github.com/jverkoey/iOS-Framework