* Tidy the header imports, forward declaring classes and protocols where appropriate to avoid import cycles and using the framework/system header notation for imports occuring in .h files.

* Perhaps controversially, decomposing ASRangeControllerUpdateRangeProtocol+Beta.h such that the categories on various classes are defined in the classes themselves since that's where the implementation of those categories is provided.
* Updating unit tests and import other headers the tests took for granted. The tests could probably import the umbrella header and not have to worry about this.
* Updating the "Life without Cocoapods" sample to build and run dependent on ASDK as a static library.
* Added a "Life With Frameworks" sample app to build and run dependent on ASDK as a framework, proving the framework targets work.

AsyncDisplayKit/ASPagerNode.h

@@ -11,6 +11,7 @@
 //
 
 #import <AsyncDisplayKit/ASCollectionNode.h>
+#import <AsyncDisplayKit/ASDataController.h>
 
 @class ASPagerNode;
 @class ASPagerFlowLayout;