Suggestion: add list construction using range not including final

Please add another way of creating a list which doesn't include final number (like `...` in Ruby)

like this:
```nemerle
def l1 = $[0 .. 3]; // an existing way
// [0, 1, 2, 3]
def l2 = $[0 ... 3] // another way
// [0, 1, 2]
```