Add emitted events

[icehaunter]

It would be great to emit at least some events which were present in a previous version:

(Quoting from the previous docs):

Event	Output	Description
opened [done]		The picker is opened
closed [done]		The picker is closed
selected	Date|null	A date has been selected
selectedDisabled	Object	A disabled date has been selected
input	Date|null	Input value has been modified
cleared		Selected date has been cleared
changedMonth [done]	Object	Month page has been changed
changedYear [done]	Object	Year page has been changed
changedDecade [done]	Object	Decade page has been changed

[adamorlowskipoland]

What is up with this? Will it be implemented?