podspecの追加

PIImageCache.podspec

@@ -0,0 +1,17 @@
+Pod::Spec.new do |s|
+
+  s.name                   = "PIImageCache"
+  s.version                = "0.1.1"
+  s.summary                = "Ripple Effect for iOS (swift)"
+  s.homepage               = "https://github.com/pixel-ink/PIImageCache"
+  s.license                = { :type => "MIT", :file => "LICENSE" }
+  s.author                 = { "pixelink" => "https://github.com/pixel-ink" }
+  s.social_media_url       = "http://twitter.com/pixelink_jp"
+  s.ios.deployment_target  = "8.0"
+  s.source                 = {
+                               :git => "https://github.com/pixel-ink/PIImageCache.git",
+                               :tag => s.version
+                             }
+  s.source_files           = "**/PIImageCache.swift"
+
+end