composer.json

{
  "repositories": [
    {
      "type": "composer",
      "url": "http://wpackagist.org"  
    },
    {
      "type": "package",
      "package": {
        "name": "wordpress",
        "type": "webroot",
        "version": "4.0",
        "dist": {
          "type": "zip",
          "url": "https://github.com/WordPress/WordPress/archive/4.0.zip"
        },
        "require" : {
          "fancyguy/webroot-installer": "1.0.0"
        }
      }
    }
  ],
  "require": {
    "php": ">=5.3.0",
    "wordpress": "4.0",
    "fancyguy/webroot-installer": "1.0.0",
    "wpackagist-plugin/advanced-custom-fields":"*",
    "wpackagist-plugin/admin-post-navigation":"*",
    "wpackagist-plugin/debug-bar":"*",
    "wpackagist-plugin/google-analytics-for-wordpress":"*",
    "wpackagist-plugin/jetpack":"*",
    "wpackagist-plugin/regenerate-thumbnails":"*",
    "wpackagist-plugin/show-template":"*",
    "wpackagist-plugin/simple-page-ordering":"*",
    "wpackagist-plugin/tc-custom-taxonomy-filter":"*",
    "wpackagist-plugin/theme-check":"*",
    "wpackagist-plugin/wordpress-importer":"*",
    "wpackagist-plugin/worker":"*"
  },
  "extra": {
    "webroot-dir": "_wp",
    "webroot-package": "wordpress"
  }
}