#7 Unify Calendar and Date usage

[PhoneixS]

I think that DatePicker and VetoPolicy must use (or at least let you use) the same class for dates.

DatePicker uses Date class and VetoPolicy use Calendar class, so you need to get around this all time creating new instances, etc. I think if both use the same class (I preferred Calendar because is more powerful) it will be more easy to use this components together.

And maybe instead of remove date methods, you can add Calendar methods to datePiker (and maybe use it internally) and do a simply Calendar.getDate() when needed to return it.

[teddybear]

https://github.com/tdbear/microba/issues/5