Updating the README for changes to validate task and addition of package task.
Updating the README for changes to validate task and addition of package task.

AndBicScadMedia/grunt-drupal-tasks,puppetlabs/grunt-drupal-tasks,EvanLovely/grunt-drupal-tasks,phase2/grunt-drupal-tasks,phase2/grunt-drupal-tasks,phase2/grunt-drupal-tasks,AndBicScadMedia/grunt-drupal-tasks,puppetlabs/grunt-drupal-tasks,AndBicScadMedia/grunt-drupal-tasks,EvanLovely/grunt-drupal-tasks,EvanLovely/grunt-drupal-tasks,puppetlabs/grunt-drupal-tasks,puppetlabs/grunt-drupal-tasks,EvanLovely/grunt-drupal-tasks,AndBicScadMedia/grunt-drupal-tasks