code: function getMain(src, options, dest) {
      var meta = grunt.file.readJSON(path.join(src, 'package.json'))
      if (!meta.main) {
        fail.fatal(
          'No main property specified by ' + path.normalize(src.replace(options.srcPrefix, ''))
        )
      }
      var files = typeof meta.main === 'string' ? [meta.main] : meta.main
      return files.map(function(source) {
        return {
          src: path.join(src, source),
          dest: dest
        }
      })
    }
docs: Get the main files for a particular package
  @param {string} src
  @param {Object} options
  @param {string} dest
  @returns {Array} Returns an array of file locations from the main property