Bug fixes

Update IP detection logic
Update check users/comments form
Improved spam check logic
Fix issues with PHP < 5.4
Other minor improvements

1. Refactor the class that determines edit access into a service
2. User with ID 1 is no longer editable by other users
3. Add a message on the role reorder form that says exactly what this module does
4. Add the option to flip the role hierarchy
5. Add the option for strict hierarchy check so that users can no longer edit users with equal roles

Fixed a conflict bug if the files have the same name.

- Cancelling the login no longer creates an account.
- Better username generation.