Delete the wlm.php file and move some file to folders.
[Upgrade Drupal7] Modify the INSTALL file.
[Upgrade Drupal7] Modify the .info file.
[Upgrade Drupal7] Modify the .install file.
[Upgrade Drupal7] Add .admin.inc file and delete this section from the .module file.
[Upgrade Drupal7] Modify the .module file.