Add The Seven Tasks campaign by Philtron R./skraeling

Add The Seven Tasks campaign by Philtron R./skraeling

It is licensed under CC-BY-SA 4.0 International with attribution to
Philtron R., as mentioned on the Lugaru forums:

> *Note:** This mod (campaign, maps and custom textures) is licensed under
> the Creative Commons Attribution - Share Alike license, version 4.0
> International (CC-BY-SA 4.0, https://creativecommons.org/licenses/by-sa/4.0/)
> Attributions can be made to "Philtron R.".

Permalink: https://web.archive.org/web/20161214063840/http://forums.wolfire.com/viewtopic.php?f=7&t=4633