Lift with a signal of tuples of arguments.
Merge pull request #1398 from ReactiveCocoa/lift-with-signal-of-arguments

Lift with a signal of tuples of arguments.
Referencing the right class in the RACScheduler method deprecation message.
Merge pull request #1401 from JaviSoto/patch-1

Referencing the right class in the RACScheduler method deprecation message
Merge remote-tracking branch 'origin/master' into swift-development