* Calcolatrice
 *
 * Calcolatrice standard e scientifica in Obj-c/Cocoa.
 *
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * 
 * @author Michele Guerini Rocco aka Rnhmjoj
 * @since 2012