Replace core language HexStrings with library entity

[Andrei Alexandrescu via Digitalmars-d]

On 3/16/15 11:54 AM, bearophile wrote:
> Andrei Alexandrescu:
>
>> That opens the question whether we want only ubyte[] for hex bytes or
>> all integral types.
>
> I suggest to implement only ubyte[] first. And wait for enhancement
> requests.

At a minimum we need the built-in replacement. -- Andrei