Merge pull request #22 from convoyinc/igrayson/fix-podspec

Fix podspec by excluding Example

ReactNativePermissions.podspec

 
   s.preserve_paths      = 'docs', 'CHANGELOG.md', 'LICENSE', 'package.json', 'ReactNativePermissions.ios.js'
   s.source_files        = '**/*.{h,m}'
+  s.exclude_files       = 'Example/**/*'
 end