[alma-config] CLEAN and difference results for B arrays

[Mark Holdaway]

> 
> What I say here can also be applied to MEM deconvolution, of course,
> although in that case you would
> probably prefer to remove a model which is some underestimate of the true
> emission, to take advantage
> of the positivity constraint, implying that you would still have to use a
> default image.
> 

PS: MEM also has a formal bias (aka default, prior) image which
is built into the entropy: in the absence of data, the solution
will default to the prior image.

	-M