code: function main(program) {
    program || (program = { args: [] });
    if(program.args.length === 0) {
      program.outputHelp();
      return process.exit(1);
    }
  
    return Promise
      .map(program.args, _.partial(exports.downloadPosting, program))
      .map(function(html) {
        return cheerio.load(html);
      })
      .map(exports.extractInfo)
      .then(_.partial(exports.outputInfo, program));
  }
docs: Takes a `program` instance from the `commander` module and executes the `cli`
  functionality.
  
  @param {Object} program A `program` object from `commander`
  @return {Promise} A promise to the execution's result