Adding detection for more fan games

I've added detection for three more Wintermute games:

Helga Deep In Trouble demo
Space Invaders demo
Paintaria

And the AGI demo of The Ultimate AGI Fangame

The Helga Deep In Trouble demo can be found here: http://helgagame.com/download_demo.php
The Space Invaders demo can be found here: https://docs.google.com/file/d/0B1Y5w30FUPM7bk1UQ1BGR2ZVZ2s
Paintaria can be found here: http://traktorgames.wordpress.com/2013/09/11/paintaria-released/
The Ultimate AGI Fangame Demo can be found here: http://ultimate-agi-fangame.zzl.org/demo.html