- Changed task-tag action from simple-critical to simple-edit.
- Fixed downloading attachments containing grader from normal (non-task) pages.
- Moved a call to remote_ip_info() from common/ to www/ where it's supposed to be in MVC.
- Fixed round and task tests.
- Fixed test cleanup to delete only the created users and to delete them from the forum also.
- Check that the username doesn't exist in the forum when someone tries to register (there are users on the forum that are not on infoarena, because of the import from info.devnet.ro i guess). Having two smf users with the same name crashes things.
- Allow rounds to have no tasks.