Add Cocoapods RNAudioStreaming.podspec file

[SiriusDely]

so that we can install using these steps:

1. run npm install react-native-audio-streaming --save
2. add pod 'RNAudioStreaming', :path => './node_modules/react-native-audio-streaming' to Podfile
3. run pod install

[tlenclos]

Thanks ! Could you update the installation process in the README accordingly ?

[SiriusDely]

README updated!

[tlenclos]

Thanks 👍

[SiriusDely]

Thanks! 👍

Just one more thing, you need to do npm version update/publish before everyone can do the installation steps above. Because 2.3.0 doesn't have the Podspec file yet.

[tlenclos]

Done.

[SiriusDely]

OK, I have confirmed that it is working by uninstall/reinstalling npm module (2.3.1) and do pod install.