properly print dat url on link command and download in background

cli.js

@@ -147,7 +147,7 @@ function link (dir, server) {
      if (!stats[dir]) return
      if (stats[dir].total && linking) return printFileProgress(stats[dir], {message: 'Adding Files to Dat'})
      var statusText
      if (stats[dir].total) statusText = 'Creating Dat Link'
      if (stats[dir].total) statusText = chalk.green('[Creating Dat Link]')
      else statusText = chalk.bold.blue('Calculating Size')

      var msg = getScanOutput(stats[dir], statusText)
@@ -176,7 +176,9 @@ function download (link, dir, server) {
    return usage('root.txt')
  }
  logger.stdout(chalk.bold('Connecting...\n'))
  server.join(link, dir, {wait: false})
  server.joinSync(link, dir, function (err) {
    if (err) onerror(err)
  })
  var downloadInterval = setInterval(function () {
    server.status(function (err, status) {
      if (err) throw err
@@ -188,9 +190,10 @@ function download (link, dir, server) {
        // Print final metadata output
        var scanMsg = ''
        stats.gettingMetadata = false
        scanMsg = getScanOutput(stats, 'Downloading Data')
        scanMsg = getScanOutput(stats, chalk.green('[Downloading]'))
        logger.stdout(scanMsg)
        logger.log('')
        logger.log('Type ' + chalk.bold('dat status') + ' to see download progress.')
        clearInterval(downloadInterval)
      }
    })
@@ -200,9 +203,9 @@ function download (link, dir, server) {
function getScanOutput (stats, statusMsg) {
  if (!statusMsg) statusMsg = chalk.bold.green('Scan Progress')
  var dirCount = stats.total.directories
  return statusMsg + ' ' + chalk.bold(
    '(' + stats.total.filesTotal + ' files, ' + dirCount + ' folders, ' +
    (stats.total.bytesTotal ? prettyBytes(stats.total.bytesTotal) + ' total' : '') + ')'
  return statusMsg + ' ' + chalk.dim(
    stats.total.filesTotal + ' files, ' + dirCount + ' folders, ' +
    (stats.total.bytesTotal ? prettyBytes(stats.total.bytesTotal) + ' total' : '')
  )
}