fix+[JFFPurchsing purcheserWithProduct:srvCallback:] loader's laziness
fix bugs related to using finishTransaction:. This method is async, so use it only via loader
code style fix
arm64 bit competibility changes
use native NSUUID class
fix crash under IOS7
create seperate JFFImage cache load image error
add class name to error log description
add -[JFFMutableAssignArray removeObjectAtIndex:] and -[JFFMutableAssignArray indexOfObject:] methods
arm64 bit competibility changes
add -[NSArray lastMatch:] method
add -[NSError isActiveCallError] method