Allow deprecation warnings in unit tests
Move RACReplaySubject tests into their own file

We’re going to keep them around because the class will continue to
exist, so we want to only suppress deprecation messages there.

Really, this is how it should’ve been organized in the first place.
Remove RACCommandSpec
Remove RACSequence specs
Test fixes for various deprecated methods
Remove tests for -tupleByAddingObject:
Remove RACMulticastConnectionSpec
Remove tests for -scheduleRecursiveBlock:
Remove deprecated tests in RACSignalSpec
Split RACSignal+Operations tests into their own spec
Migrate RACStreamExamples to RACSignal specifically
Fix -zipWith: on infinite, synchronous signals
Fix operator ordering in -concat test
Add missing OSAtomic import to RACReplaySubjectSpec
Merge pull request #1075 from ReactiveCocoa/update-unit-tests

Remove deprecated methods and classes from unit tests