Fix command for making drush executable
Merge pull request #54 from t4k/patch-1

Fix documentation for making drush executable in README.md
Updated typhinting, status() calls, and storage controller usage
Merge pull request #57 from damiankloip/vdc-api-update

Updated typhinting, status() calls, and storage controller usage for views commands
drush_valid_drupal_root() requires only a file called includes/common.inc to match a Drupal directory, which causes problems when this file pattern appears elsewhere, in non-Drupal root contexts (e.g. in module_builder module).