Added calendar Property to GlobalizeCulture

The calendar Property is used to get and set the default calendar. See
https://github.com/jquery/globalize/tree/79ae658b842f75f58199d6e9074e01f7ce207468#defining-culture-information and https://github.com/jquery/globalize/blob/79ae658b842f75f58199d6e9074e01f7ce207468/lib/globalize.js#L263

This is against the 0.x branch of Globalize. (1.x is in alpha)