function init(name, options) {
  validateProjectName(name);

  if (fs.existsSync(name)) {
    createAfterConfirmation(name, options);
  } else {
    createProject(name, options);
  }
}
@param name Project name, e.g. 'AwesomeApp'.
@param options.verbose If true, will run 'npm install' in verbose mode (for debugging).
@param options.version Version of React Native to install, e.g. '0.38.0'.
@param options.npm If true, always use the npm command line client,
                      don't use yarn even if available.