Adding Dark Magic:

	* Added in ea_skills.xml.
	* Added in skills.xml.
	* Added Dark Magic image, done by wushin, enchilado and Alige.
	* Edited license.txt.
	* Added particle effect for Dark Magic.
017-3: fix

fixing misplaced tile reported by  Kazenawa http://forums.themanaworld.org/viewtopic.php?f=2&t=17673