Please stop changing the todayBtn type...

$('#start').datepicker({
                startDate: new Date(2013, 0, 0),
                endDate: moment().startOf('day').toDate(),
                todayBtn: 'linked'
            })
Merge pull request #1867 from niemyjski/patch-3

bootstrap.datepicker: reverted DatepickerOptions.todayBtn type to any.