Add tests and support for using bitwise specifiers for `enqueuedObjectRequestOperationsWithMethod:matchingPathPattern:` refs #1476
Add `prefix_header_contents` to suppress System Configuration and Core Services warnings when building under CocoaPods 0.21
Export `RKStringDescribingRequestMethod` so that it can be used outside of RKRoute.m
Add `method` to relationship route stubbing
Add Apache License boilerplate to Testing.h