`minutesStep`, `secondsStep` and `showSeconds` options

Added `minutesStep`, `secondsStep` and `showSeconds` options.
But there is a problem:

```
Test "Options: showSeconds" assertion failed. Expected <2012-03-05 15:09:02.00> Actual <2012-03-05 15:00:02.00>
```

If we don't touch minutes select box - it's not set thyself. O_o

@rchavik, what do you think, what is it?