TimePicker misses onChangeTime and 24 hour

[minusplusminus]

Problem description

Hi thanks for the library. Love the style,

I'm missing 24 hour clock and onChangeTime doesn't receive anything. The AcceptLegacy button needs onChangeTime(currHour,currMinute) on line 237 and I miss 24 hour clock.

<TimePicker onChangeTime={this.onChangeTime.bind(this)}/>