Address ISLANDORA-977.
Coding standards
Merge branch '7.x' of github.com:islandora/islandora_batch into 7.x-ISLANDORA-977
Don't remove a core islandora varible.
Merge pull request #31 from ruebot/7.x-1.4-ISLANDORA-977

ISLANDORA-977 -- Delete drupal variables on uninstall.