adding podspec

ZLSwipeableSwift.podspec

@@ -0,0 +1,22 @@
+Pod::Spec.new do |s|
+  s.name         = "ZLSwipeableViewSwift"
+  s.version      = "0.0.1"
+  s.summary      = "A simple view for building card like interface like Tinder and Potluck."
+  s.description  = <<-DESC
+                  ZLSwipeableViewSwift is a simple view for building card like interface like Tinder and Potluck.
+                   DESC
+  s.homepage     = "https://github.com/zhxnlai/ZLSwipeableViewSwift"
+  s.screenshots  = "https://github.com/zhxnlai/ZLSwipeableViewSwift/raw/master/Previews/animation.gif", "https://github.com/zhxnlai/ZLSwipeableViewSwift/raw/master/Previews/swipe.gif", "https://github.com/zhxnlai/ZLSwipeableViewSwift/raw/master/Previews/direction.gif", "https://github.com/zhxnlai/ZLSwipeableViewSwift/raw/master/Previews/undo.gif"
+  s.license      = { :type => "MIT", :file => "LICENSE" }
+  s.author             = { "Zhixuan Lai" => "[email protected]" }
+  s.social_media_url   = "http://twitter.com/ZhixuanLai"
+
+  s.platform     = :ios, "8.0"
+
+  s.source       = { :git => "https://github.com/zhxnlai/ZLSwipeableViewSwift.git", :tag => "0.0.1" }
+  s.source_files  = "ZLSwipeableViewSwift/*.swift"
+
+  s.framework  = "UIKit"
+
+  s.requires_arc = true
+end