Minimum composer json for https://www.drupal.org/node/1886820#comment-9454969

composer.json

{
  "repositories": [
    {
      "type": "composer",
      "url": "http://drupal-packagist.webflo.io/"
    }
  ],
  "minimum-stability": "dev",
  "prefer-stable": true,
  "require": {
    "drupal/flexslider": "7.2.0-alpha3"
  }
}