Stable version

Hi there! I didn't spend enough attention to this project for a quite a while, but I can't ignore enormous amount of issues anymore. To make them approachable, I decided to start cleaning up the codebase we have nowadays. In my mind it is hard to make a good contribution if project doesn't even keep the same code style. Also, its pretty said to see things like module.exports in React Native modules in 2017.

Therefore, I started cleaning this project up by introducing a code style standard. Here is a list of current changes:

• Assembled https://github.com/airbnb/javascript to maintain one of the most common javascript code styles
• Assembled Flow to replace comments by types and improve developer experience overall
• Updated Basic example to use latest version of React/React Native

Breaking changes:

• Using ES module notation instead of commonJS one, e.g. from now on it should be

   import SideMenu from 'react-native-side-menu';

  instead of

  const SideMenu = require('react-native-side-menu');

  (yay! 🎉 )