github/ReactiveCocoa — pull request #118 by joshaber (2012-11-20 06:01:25+00:00)
Title: Subscribable => Signal

We talked about this at the summit and @jspahrsummers and @alanjrogers both seemed to agree really quickly that "signal" was a much better name than "subscribable."

This is obviously a huge breaking change but worth it as we approach 1.0.