Add PromiseKit dependency

- Added PromiseKit dependency

Carthage/Checkouts/PromiseKit/Extensions/Social/Sources/SLRequest+AnyPromise.h

@@ -0,0 +1,36 @@
+//
+//  Created by merowing on 09/05/2014.
+//
+//
+//
+
+#import <PromiseKit/AnyPromise.h>
+#import <Social/SLRequest.h>
+
+/**
+ To import the `SLRequest` category:
+
+    use_frameworks!
+    pod "PromiseKit/Social"
+
+ And then in your sources:
+
+    @import PromiseKit;
+*/
+@interface SLRequest (PromiseKit)
+
+/**
+ Performs the request asynchronously.
+
+ @return A promise that fulfills with three parameters:
+
+  1) The response decoded as JSON.
+  2) The `NSHTTPURLResponse`.
+  3) The raw `NSData` response.
+
+ @warning *Note* If PromiseKit determines the response is not JSON, the first
+ parameter will instead be plain `NSData`.
+*/
+- (AnyPromise *)promise NS_REFINED_FOR_SWIFT;
+
+@end