Transf - Transposes and FFTs a dataset
!#$=head1 SYNOPSIS
Transf <in.H >out.H
!#$=item f_min - float
[0]: Minimum frequency (only needed for forward op)
[f_min]: Minimum frequency with 100% pass (only needed for forward op)
[.5/d1]: Maximum frequency (only needed for forward op)
[f_max]: Maximum frequency with 100% pass (only needed for forward op)
[0]: How many n=1 axes to introduce or remove after the frequency axis
[50]: Maximum megabytes to use
[n]: Whether or not to be verbose
[false]: Do WEI style transforms
Transforms a dataset (and its inverse) from (nt,nx,...) to (nx ...,nt)
Forward/Inverse determined from esize (4-forward, 8-inverse)
WARNING WARNING WARNING: Unpipable