2.4.1
Squashed commit of the following:
NSSecureCoding
Replace all uses of NSCoding to NSSecureCoding
[Issue #2240] Replacing MAX_ALLOWED macro with MIN_REQUIRED
Fixing merge from 61b7a9b
Compile AFNetworking for iOS 6 and iOS 7
Bumping copyright year
Removing #import <AssertMacros.h>
Whitespace
[Issue #2249] Documenting fact that form data should not be nil
Adding explicit casts and #pragma ignore to fix warnings about out-of-range enumerated type value assignment
[Issue #2285] Fixing potential crash caused by failed validation with nil responseData
[Issue #2237] Correcting documentation for URLSessionDidFinishEventsForBackgroundURLSession delegate method and reorganizing code accordingly