Fix event.key for keypress. It doesn't need to lookup keynames with keypress and shift

mootools/mootools-more#1194

Author: arian

Source/Types/DOMEvent.js

@@ -45,7 +45,7 @@ var DOMEvent = this.DOMEvent = new Type('DOMEvent', function(event, win){
 
 	if (type.indexOf('key') == 0){
 		var code = this.code = (event.which || event.keyCode);
-		this.key = _keys[code]/*<1.3compat>*/ || Object.keyOf(Event.Keys, code)/*</1.3compat>*/;
+		this.key = !this.shift && (_keys[code]/*<1.3compat>*/ || Object.keyOf(Event.Keys, code)/*</1.3compat>*/);
 		if (type == 'keydown' || type == 'keyup'){
 			if (code > 111 && code < 124) this.key = 'f' + (code - 111);
 			else if (code > 95 && code < 106) this.key = code - 96;