fixed chat sending messages from web.

event.keyCode === '13', where the strict equal operator seem to break
safari, firefox and chrome (different value types? keydown event seem
not to provide either a string nor an integer)

web/map.js

@@ -208,7 +208,7 @@ DynMap.prototype = {
 					value: ''
 				})
 				.keydown(function(event) {
-					if (event.keyCode === '13') {
+					if (event.keyCode == '13') {
 						event.preventDefault();
 						sendChat(chatinput.val());
 						chatinput.val('');