* Source/GSFFCallInvocation.m
(gs_method_for_receiver_and_selector): Replace usage of
class_get_instance/class_method with GSGetInstance/ClassMethod and
Method_t with GSMethod.
(gs_find_by_receiver_best_typed_sel): Ditto.
(GSInvocationCallback): Ditto.
([GSFFCallInvocation -invokeWithTarget:]): Ditto.
* Source/GSFFIInvocation.m
(gs_method_for_receiver_and_selector): Ditto.
(gs_find_by_receiver_best_typed_sel): Ditto.
(GSFFIInvocationCallback): Ditto.
([GSFFIInvocation -invokeWithTarget:]): Ditto.
* Source/NSConnection.m
([NSConnection -_service_typeForSelector:]): Ditto.
* Source/NSInvocation.m
([NSInvocation -invokeWithTarget:]): Ditto.
* Source/NSObject.m
([NSObject +instanceMethodSignatureForSelector:]): Ditto.
([NDObject -methodSignatureForSelector:]): Ditto.
([NSObject +descriptionForInstanceMethod:]): Ditto.
([NSOnject -descriptionForMethod:]: Ditto.
* Source/NSProxy.m
([NSProxy +methodSignatureForSelector:]): Ditto.
([NSProxy -methodSignatureForSelector:]): Ditto.
* Source/NSDistantObject.m
([NSObject -selectorTypeForProxy:]): Ditto.
([NSDistantObject +respondsToSelector:]): Ditto. Corrected
implementation to check class methods instead of instance methods.
OK to commit?