sane.ds: Add Welsh resource

[Huw Davies]

On Mon, Jul 05, 2010 at 06:51:36PM +0100, Ken Sharp wrote:
> +{
> + 0 ""
> + 1 "px"
> + 2 "b"  /* What is "b" ? */
> + 3 "mm"
> + 4 "dpi" /* dotiau fesul modfedd */
> + 5 "%"
> + 6 "ns" /* What is "ns" ? */
> +}

See the SANE_UNIT_ defines in /usr/include/sane/sane.h

'b' is bits and 'ns' should be microseconds, so it looks like the
English resource is incorrect too.

Huw.
PS Happy to see the Welsh translations coming in!