Drupal 7 support, Clean code to Drupal codestyle and add support for options

Drupal 7 support from https://github.com/georgwaechter
1. Cleaned code to follow Drupal style

2. add support for options

Previously if you write in drake file
pm-enable --user=1

--user=1 was not passed correct, because drake works only with args.
Not I fix this.