- added int() built-in which allows a float32/64 to be converted to to an int.

- Added time.Unix() alias

- Constants will automatically be converted to the proper type based on a
method's input type (like in Go proper). For example, given a method with
a signature (x int64), calling it with 458  will now work (it used to complain
that 458 (an int) couldn't be used as an int64).