code: function (file) {
    var match = pattern.exec(basename(file));
  
    return { date: match[1], url: match[2] };
  }
docs: Extracts date and permalink parts from a Jekyll style post.
  
  @example
  
  parseJekyllStylePost("2014-04-05-hello-world.md");
  //=> { date: "2014-04-05", url: "hello-world" }
  
  @param  {String} file
  @return {Object.<string, string>}