Added a podspec for SocketRocket (see #4)

SocketRocket.podspec

@@ -0,0 +1,13 @@
+Pod::Spec.new do |s|
+  s.name         = "SocketRocket"
+  s.version      = '0.1'
+  s.summary      = 'A conforming WebSocket (RFC 6455) client library.'
+  s.homepage     = 'https://github.com/square/SocketRocket'
+  s.authors      = { 'Square' => 'lewis@squareup.com' }
+  s.source       = { :git => 'git://github.com/square/SocketRocket.git' }
+  s.source_files = 'SocketRocket/*.{h,m,c}'
+  s.clean_paths  = %w{SRWebSocketTests SocketRocket.xcodeproj TestChat TestChatServer TestSupport extern}
+  s.requires_arc = true
+  s.frameworks   = %w{CFNetwork Security}
+  s.libraries    = "icucore"
+end