Include the NativeAnimation module on iOS in the starter project

[janicduplessis]

https://github.com/facebook/react-native/tree/master/Libraries/NativeAnimation should be included when creating a new project. We will want to use native animations in react-native core so having it included by default makes sense. It is also included by default on Android now.

[petrgazarov]

I'm new to the codebase and would like to take this on if that's alright. I looked around and couldn't find where this logic lives. Perhaps if you have a minute, can you point out where/how it is included on Android? Also, some steps to test expected behavior. Should there be an automated test? Thanks!!

[sreejithr]

@janicduplessis I've made a pull request here. I added the ../node_modules/react-native/Libraries/NativeAnimation/RCTAnimation.xcodeproj file and linked libRCTAnimation.a, in local-cli/generator-ios/templates/xcodeproj/project.pbxproj.

Do let me know if everything is OK. I published my branch in Sinopia and tried having useNativeDriver. No errors. Animation works. Thank you.