FOMERG: Merge two Fourier Maps

FOMERG Option Code

upper threshold for map 1 densities th1 t 0.001

upper threshold for map 2 densities th2 t 0.001

weight densities from map 1 wt1 t 1.0

weight densities from map 2 wt2 t 1.0

map lines printed per layer pr n0