github/ReactiveCocoa — pull request #270 by jspahrsummers (2013-01-07 22:32:34+00:00)
Title: Replace -asMaybes with -materialize/-dematerialize

`-materialize` matches Rx, and also brings the `completed` event into the stream of values. This means that all events can be bound, mapped, filtered, etc. following materialization.

It does _not_, however, resubscribe to the signal like `-asMaybes` did. This is trivial to do using `-repeat` and/or `-retry` instead.