fix #158, check more grained format for input
fix #158, check more grained format for input

ng2-ui/datetime-picker,jsvalley/ng2-datetime-picker,jsvalley/ng2-datetime-picker,ng2-ui/ng2-datetime-picker,ng2-ui/datetime-picker,ng2-ui/datetime-picker,ng2-ui/ng2-datetime-picker,ng2-ui/ng2-datetime-picker,jsvalley/ng2-datetime-picker,jsvalley/ng2-datetime-picker