Removed RACActiveSignals checking in RACDynamicSignal.
Fixed some tests.
Removed some tests that were testing implementation details.
Isolated multicasted subscription disposal test because ARC.
This isn't needed anymore.
Optimize -take: in case the count is 0

Comes from d87adfb (3.0-development).
Reconsider conditional expression on -take:
++xcconfigs
Don't automatically build tests with main target
Rename boolean operators for Swift compatibility
Add other headers to umbrella (required for modules)
Define a module for ReactiveCocoa-Mac too
Include EXTScope.h in ReactiveCocoa.h
Merge pull request #1436 from kylef/extscope2

Include EXTScope.h in ReactiveCocoa.h
Merge remote-tracking branch 'origin/master' into xcode6
Revert "Rename boolean operators for Swift compatibility"

This reverts commit a2d8c1b75902dcd695862ddcf881b05bedd86c2e.
Failing unit test to expose thread-unsafe implementation of -[RACSerialDisposable disposable].
Reimplement RACSerialDisposable with OSSpinLock rather than OSAtomic in order to fix -disposable method to be thread safe.
Add [UIAlertView rac_willDismissSignal]. This is required when events are required if the alert is dismissed programatically. rac_buttonClickedSignal does not fire an event in that situation.
Merge remote-tracking branch 'origin/master' into remove-racactivesignals