Fix componentWillReceiveProps(), updateWeekStart(), onDateSelected(). 
Fix componentWillReceiveProps(), updateWeekStart(), onDateSelected(). 

componentWillReceiveProps() passes correct selectedDate field to updateWeekStart(). 
updateWeekStart() diff calculation must use startOf('day') for both dates. 
onDateSelected() properly sets week data. 

BugiDev/react-native-calendar-strip,BugiDev/react-native-calendar-strip,BugiDev/react-native-calendar-strip