Add PromiseKit dependency

- Added PromiseKit dependency

Carthage/Checkouts/PromiseKit/Extensions/QuartzCore/Sources/CALayer+AnyPromise.h

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+//
+//  CALayer+AnyPromise.h
+//
+//  Created by María Patricia Montalvo Dzib on 24/11/14.
+//  Copyright (c) 2014 Aluxoft SCP. All rights reserved.
+//
+
+#import <QuartzCore/QuartzCore.h>
+#import <PromiseKit/AnyPromise.h>
+
+/**
+ To import the `CALayer` category:
+
+    use_frameworks!
+    pod "PromiseKit/QuartzCore"
+
+ Or `CALayer` is one of the categories imported by the umbrella pod:
+
+    use_frameworks!
+    pod "PromiseKit"
+
+ And then in your sources:
+
+    @import PromiseKit;
+*/
+@interface CALayer (PromiseKit)
+
+/**
+ Add the specified animation object to the layer’s render tree.
+
+ @return A promise that thens two parameters:
+
+  1. `@YES` if the animation progressed entirely to completion.
+  2. The `CAAnimation` object.
+
+ @see addAnimation:forKey
+*/
+- (AnyPromise *)promiseAnimation:(CAAnimation *)animation forKey:(NSString *)key;
+
+@end

Carthage/Checkouts/PromiseKit/Extensions/QuartzCore/Sources/CALayer+AnyPromise.m

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+//
+//  CALayer+PromiseKit.m
+//
+//  Created by María Patricia Montalvo Dzib on 24/11/14.
+//  Copyright (c) 2014 Aluxoft SCP. All rights reserved.
+//
+
+#import <QuartzCore/CAAnimation.h>
+#import "CALayer+AnyPromise.h"
+
+@interface PMKCAAnimationDelegate : NSObject <CAAnimationDelegate> {
+@public
+    PMKResolver resolve;
+    CAAnimation *animation;
+}
+@end
+
+@implementation PMKCAAnimationDelegate
+
+- (void)animationDidStop:(CAAnimation *)ignoreOrRetainCycleHappens finished:(BOOL)flag {
+    resolve(PMKManifold(@(flag), animation));
+    animation.delegate = nil;
+}
+
+@end
+
+@implementation CALayer (PromiseKit)
+
+- (AnyPromise *)promiseAnimation:(CAAnimation *)animation forKey:(NSString *)key {
+    PMKCAAnimationDelegate *d = animation.delegate = [PMKCAAnimationDelegate new];
+    d->animation = animation;
+    [self addAnimation:animation forKey:key];
+    return [[AnyPromise alloc] initWithResolver:&d->resolve];
+}
+
+@end

Carthage/Checkouts/PromiseKit/Extensions/QuartzCore/Sources/PMKQuartzCore.h

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+#import "CALayer+AnyPromise.h"