[phenixbb] auto-open MTZ scheme

[Paul Emsley]

Dear Phenixers,

Prompted by Randy Read, Kevin and I have agreed that Coot should be able 
to auto-open MTZ files with columns labelled

groupname.F_phi.F and groupname.F_phi.phi

and

groupname.DF_phi.DF, groupname.DF_phi.phi for difference maps

for any value of groupname, of course.

(Any weights should be applied to Fs before writing the file).

We were wondering what the Phenix community/developers thought about that idea (there's not much point in adding this feature if you don't agree).

Thanks, 

Paul.