Updated readme

Author: Christian König

README.md

@@ -25,7 +25,7 @@ Applications that would like to access the figo Connect have to register with us
 Website: [http://figo.io](http://figo.io)
 
 
-## Installation
+## Setup
 
 ### Submodule
 
@@ -39,6 +39,17 @@ Integrate the framework into your project:
 * Select the Figo.xcodeproj in the Project Navigator and verify the deployment target matches that of your application target.
 * Add the Figo.framework to your target(s) in the "Embedded Binaries" sections
 
+### The bridging header
+
+We need CommonCrypto for our SSL pinning implementation, which is not available as a modular header. This makes it a bit challenging to import it into Swift. To work around this, we have included an Objective-C bridging header which imports the headers.
+
+	#import <CommonCrypto/CommonCrypto.h>
+
+If you want to add our source files directly without adding the project as a sub-project in Xcode, you have to add that import to your bridging header.
+
+### Cocoapods / Carthage
+
+We don't support Cocoapods because it doesn't support the bridging header at this time. As for Carthage, we just haven't come around to it yet.
 
 ## Usage