ReactiveCocoa/ReactiveCocoa — pull request #751 by lukeredpath (2013-08-18 16:20:45+00:00)
Title: Avoid retain cycles between RACDelegateProxy and RACEventTrampoline

Trampolines will always have a strong reference to their delegate proxy
for its lifetime, so we can safely have a non-retained back reference,
breaking the cycle.

Fixes #743.