Update TimeView.js

Telpuk

2016-02-03 49a27b80b63d7359a1aa6786b69ea1fc26f6cc1e

Update TimeView.js

I have warning 
Warning: validateDOMNesting(...): <span> cannot appear as a child of <table>. See Connect(ClassroomModuleView) > ClassroomModuleView > myComponent> (unknown) > (unknown) > table > span.

 src/TimeView.js

@@ -79,7 +79,7 @@
    },
    renderHeader: function(){
        if( !this.props.dateFormat )
            return '';
            return null;

        var date = this.props.selectedDate || this.props.viewDate;
        return DOM.thead({ key: 'h'}, DOM.tr({},