translate <angstroms>

> The upcoming translation command with floats for A units.
> By the way, for the vector translation I would
suggest to leave the x y
> z naming away, simply give the vector values.
> translate 29.0 15.0 0.0
> for
> translate x 29.0
> translate y 15.0

very good point

I am going to implement it this way. I am not going to
use the 'units'
that Herbert advocated.