Function: `DateCompare`

Compares the difference between two dates - returning 0 if equal, -1 if date2 is less than date1 and 1 if the inverse

Method Signature

DateCompare(date1=[any], date2=[any], datepart=[string])

Argument	Type	Required	Description
`date1`	`any`	`true`	The reference date object
`date2`	`any`	`true`	The date which to compare against date1
`datepart`	`string`	`false`