vectorisation code?

[Herbert Valerio Riedel]

On 2016-01-22 at 17:23:18 +0100, Geoffrey Mainland wrote:
> I didn't mean to suggest that DPH should be part of every build, just
> that it should be part of *some* regular build.
>
> If we're willing to do that, then I'm certainly willing to get DPH
> back up and running.

What's the situation with the `vector`/`primitive` packages if DPH is to
be resuscitated? Does the official `vector` package need to be made
DPH-aware?