Knockout-Validation - Use an icon instead of message

Issue #317

HTML

<script src="https://rawgit.com/Knockout-Contrib/Knockout-Validation/master/Dist/knockout.validation.js"></script>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css">
<script id="faTemplate" type="text/html">
    <i class="fa fa-asterisk validationMessage"></i>    
</script>
<input type="text" data-bind="value: name" />

CSS

.validationMessage {
    color: #cc0000;
}

JavaScript

ko.validation.init({
    messagesOnModified: false,
    messageTemplate: 'faTemplate',
    grouping: {
        deep: true
    },
});

function ViewModel() {
    this.name = ko.observable().extend({
        required: true
    });
};
var vm = ko.validatedObservable(new ViewModel());
ko.applyBindings(vm);

vm.errors.showAllMessages();