Disable warnings about repeated __weak usage in tests
Reproducible failing test for #711
Refactor -flatten: to fix crash and use compound disposal
++xcconfigs (via libextobjc)
Remove redundant recursive synchronization in completeSignal()
Revert "Disable warnings about repeated __weak usage in tests"

This reverts commit e7e0abd638a6a9f247a1badb622f0896783394c0.
Merge pull request #713 from ReactiveCocoa/flatten-crash

Refactor -flatten: to fix crash and use RACCompoundDisposable