Add support for passing a query of type array to store.find.

Since the query is passed directly to jQuery, this array follows
the format as specified by jQuery.param.

Use Case:
I need to send multiple filter requests to the server. Since the query is passed to jQuery, jQuery.param() is responsible for serializing the array. http://api.jquery.com/jQuery.param/
The example I added to the documentation follows jQuery's serializeArray() convention.