adding support for new drush versions
adding drush tarball
Revert ".htaccess is handled by the tarball itself, no special care needed"

This reverts commit 95eeb8ef4f3e4027cf5040abc4970d11e1c354b2.
Revert "Revert ".htaccess is handled by the tarball itself, no special care needed""

This reverts commit 0d3c877903e055c386664c85bb52e2d1aa02e2c7.
Merge branch 'develop' into feature/drupal-new