fix LIST test case

use async filesystem lookup
update dependencies from mocha install

pass list.specs.js with js[hl]int
/*jslint node: true, passfail: true, nomen: true,
         indent: 2, maxerr: 0, maxlen: 72 */

fix asylumfunk/nodeftpd#6
Merge pull request #6 from asylumfunk/issue/6

fix LIST test case