[Add] Kingfisher 1.3.1

Specs/Kingfisher/1.3.1/Kingfisher.podspec.json

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+{
+  "name": "Kingfisher",
+  "version": "1.3.1",
+  "summary": "A lightweight and pure Swift implemented library for downloading and cacheing image from the web.",
+  "description": "                   Kingfisher is a lightweight and pure Swift implemented library for downloading and cacheing image from the web. It provides you a chance to use pure Swift alternation in your next app.\n\n                   * Everything in Kingfisher goes asynchronously, not only downloading, but also caching. That means you can never worry about blocking your UI thread.\n                   * Multiple-layer cache. Downloaded image will be cached in both memory and disk. So there is no need to download it again and this could boost your app dramatically.\n                   * Cache management. You can set the max duration or size the cache could take. And the cache will also be cleaned automatically to prevent taking too much resource.\n                   * Modern framework. Kingfisher uses `NSURLSession` and the latest technology of GCD, which makes it a strong and swift framework. It also provides you easy APIs to use.\n                   * Cancellable processing task. You can cancel the downloading or retriving image process if it is not needed anymore.\n                   * Independent components. You can use the downloader or caching system separately. Or even create your own cache based on Kingfisher's code.\n                   * Options to decompress the image in background before render it, which could improve the UI performance.\n                   * A category over `UIImageView` for setting image from an url directly.\n",
+  "homepage": "https://github.com/onevcat/Kingfisher",
+  "screenshots": "https://raw.githubusercontent.com/onevcat/Kingfisher/master/images/logo.png",
+  "license": {
+    "type": "MIT",
+    "file": "LICENSE"
+  },
+  "authors": {
+    "onevcat": "onevcat@gmail.com"
+  },
+  "social_media_url": "http://twitter.com/onevcat",
+  "platforms": {
+    "ios": "8.0"
+  },
+  "source": {
+    "git": "https://github.com/onevcat/Kingfisher.git",
+    "tag": "1.3.1"
+  },
+  "source_files": "Kingfisher/*.swift",
+  "requires_arc": true
+}