Add PromiseKit dependency

- Added PromiseKit dependency

Carthage/Checkouts/PromiseKit/Extensions/OMGHTTPURLRQ/README.markdown

@@ -0,0 +1,65 @@
+# DEPRECATED
+
+Use PMKFoundation or PMKAlamofire, the promises provided by this repository are minimal
+and add little value over just using OMG by itself and passing its URLRequests to
+URLSession manually.
+
+# PromiseKit OMGHTTPURLRQ Extensions ![Build Status]
+
+This project provides convenience methods on NSURLSession using [OMGHTTPURLRQ].
+
+## Usage
+
+```swift
+URLSession.shared.POST(url, formData: params).then { data -> Void in
+    // by default you just get the raw `Data`
+}
+
+URLSession.shared.GET(url).asDictionary().then { json -> Void in
+    // call `asDictionary()` to have the result decoded
+    // as JSON with the result being an `NSDictionary`
+    // the promise is rejected if the JSON can not be
+    // decoded or the resulting object is not a dictionary
+}
+
+URLSession.shared.PUT(url, json: params).asArray().then { json -> Void in
+    // json: NSArray
+}
+
+URLSession.shared.DELETE(url).asString().then { string -> Void in
+    // string: String
+}
+```
+
+## CocoaPods
+
+```ruby
+pod "PromiseKit/OMGHTTPURLRQ", "~> 6.0"
+```
+
+The extensions are built into `PromiseKit.framework` thus nothing else is needed.
+
+## Carthage
+
+```ruby
+github "PromiseKit/OMGHTTPURLRQ-" ~> 3.0
+```
+
+The extensions are built into their own framework:
+
+```swift
+// swift
+import PromiseKit
+import OMGHTTPURLRQ
+import PMKOMGHTTPURLRQ
+```
+
+```objc
+// objc
+@import PromiseKit;
+@import OMGHTTPURLRQ;
+@import PMKOMGHTTPURLRQ;
+```
+
+
+[Build Status]: https://travis-ci.org/PromiseKit/OMGHTTPURLRQ.svg?branch=master