Adds podspec for cocoapods.

Author: oblador

RNFS.podspec

@@ -0,0 +1,11 @@
+Pod::Spec.new do |s|
+
+  s.name         = "RNFS"
+  s.version      = "1.1.0"
+  s.homepage     = "https://github.com/johanneslumpe/react-native-fs"
+  s.platform     = :ios, "7.0"
+  s.source       = { :git => "https://github.com/johanneslumpe/react-native-fs.git" }
+  s.source_files = '*.{h,m}'
+  s.preserve_paths = "**/*.js"
+
+end