Split out UI components & native modules

Now, you can specifically request whether you want to bridge a native module or a UI component with react-native-create-bridge. If you want templates that look like the old ones (combined), you can still request that by selecting both options in the prompt. 😀

Kotlin support 🎉

For all you React Native hipsters, we now have Kotlin support! Check the README for detailed instructions on how to add Kotlin to your project.