Hotfix: Downloads Drupal core using Git

## Ready State: Yes

Drupal.org D7 upgrades introduced a bug in the release information XML document. As a result, downloading Drupal core currently is required to be downloaded using its Git URL. This bug is documented in a few different places:

* https://github.com/drush-ops/drush/issues/234
* https://drupal.org/node/2126123

## Deployment

* Merge code.

## Notes

Discussion is required on whether or not this current Hotfix will remain as the method for download. If it is not, then this is a temporary hotfix until Drupal.org release information document is updated.