"Unfocus all examples in spec" action

[tjarratt]

It would be really nice to have a keyboard shortcut to unfocus all it, describe, and context in a spec.

e.g.: take something like this

fdescribe(@"CDRSFileExtensionValidator", ^{
    __block CDRSFileExtensionValidator *subject;

    beforeEach(^{
        subject = [[CDRSFileExtensionValidator alloc] init];
    });

    fit(@"should accept objective c files", ^{
        [subject isValidSourceFileExtension:@"m"] should be_truthy;
    });
});

and turn it into this

describe(@"CDRSFileExtensionValidator", ^{
    __block CDRSFileExtensionValidator *subject;

    beforeEach(^{
        subject = [[CDRSFileExtensionValidator alloc] init];
    });

    it(@"should accept objective c files", ^{
        [subject isValidSourceFileExtension:@"m"] should be_truthy;
    });
});