Fixed-Length Array Sorting

[Nordlöw via Digitalmars-d]

On Wednesday, 13 April 2016 at 19:58:49 UTC, Andrei Alexandrescu 
wrote:
> * Cut and paste error at 
> https://github.com/nordlow/phobos-next/blob/master/src/sortn.d#L90

Fixed.

> * I see some sizes are not supported, we should not have holes.
>
> * Sometimes the sort routine gets too bulky. Suggestion: also 
> define networks for medianOfUpTo and medianExactly, then use 
> them in a quicksort manner - first compute the median to 
> segregate values in below/over the median, then make two calls 
> to sortExactly!(n / 2). That way you get to sort n values with 
> median of n values (smaller and simpler) and two sorts of n / 2 
> values.

Added as TODOs for now.

Thanks!