providers.md

These providers will probably be implemented

const Cpb             = require('cpasbien-api');
const ExtraTorrentAPI = require('extratorrent-api');
const leet            = require('xtorrent');
const rbg             = require('torrentapi-wrapper');
const tpb             = require('thepiratebay');
module.exports = {
  Cpb: Cpb,
  ExtraTorrentAPI: ExtraTorrentAPI,
  leet: leet,
  rbg: rbg,
  tpb: tpb
};