Need ability to disable click event

[JollyTinker]

I have a need to use this calendar in a read-only fashion. It would be really helpful to add a disable-click or a read-only attribute.

It seems like an easy fix. The handle click function could just be wrapped in an if.

[gavinbarron]

Sounds like a good idea.

[sendilkumarn]

@gavinbarron I think we can close this issue :)