The *fft  are binary files with the Fourier transform of the
	propagator displayed in the following way

	PARAMETER(L=24,LT=48)
	parameter(Ll=6,l0=12)
	parameter(nmom=(2*Ll+1)**3*(2*L0+1)) !total number of momenta
	parameter(norb3=2100,norb4=210,maxorb=48)
	complex*16 prop(0:11,0:11,-Ll:Ll,-Ll:Ll,-Ll:Ll,-L0:L0)
c                       sink source  nz    ny      nx    nt
	remember that the inner loops are at the left. 
	The 0:11 of course represent the spin-color in the standard way
	s=0,c=0:2,s=1,c=0:2 etc	
	In other words the inner loop is the sp-col at the sink, the the sp_col
	at the source, etc. The outer loop is on nt
	The momenta are
	2 pi nx/L, 2 pi ny/L, 2 pi nz/L, pi(2nt-1)/L
	T