persistent_login 6.x-1.4-beta5

- #127359: Persistent Login across multisite on subdomains.
- #339789: Fix translatable texts in schema.
- #413114: conflict with watchdog.
- #375164 by xibun: German translation.
- #375766 by xibun: Spanish translation.
- #377038 by xibun: French translation.
- #339798 by Kuling: Polish translation.
- #323780: Fix login form alter for compatibility with other modules such as Login Toboggan.
- Added access callback to check permission to erase user's Persistent Login records.
- Fix remaining port to D6 issues in hook_help().
- Add weight to security section in user profile view.
- Delete all module variables in hook_uninstall().
- Moved a few functions to external file that's loaded when needed.
- Remove debug code (insecure).
- Minor coding-style issues here and there.