rename jsmind.editor.shortcut.js to jsmind.shortcut.js

rename jsMind.Editor.EventHandler to jsMind.ShortCut

in jsmind.shortcut.js on line 49 and 52 :
	replace nodeid.Element.removeAttribute("class");
	by viewNode.Element.className = viewNode.Element.className.replace(/\s*selected\s*/i,'');
	replace newNode.Element.className = "selected";
	by newNode.Element.className += "selected";