add function documentation for find_lowest_u_layer
add function documentation for find_lowest_u_layer

and compute_agglomerate_distance

nickvandewiele/RMG-Py,chatelak/RMG-Py,nyee/RMG-Py,nickvandewiele/RMG-Py,chatelak/RMG-Py,pierrelb/RMG-Py,nyee/RMG-Py,pierrelb/RMG-Py