fix: NL ASCII data stores diameters, not radii.
fix: NL ASCII data stores diameters, not radii.

NL ASCII reader needs to divide relevant componend in
data by 2 to match internal data representation, which
stores radii, not diameters.

lidakanari/NeuroM,wizmer/NeuroM,liesbethvanherpe/NeuroM,mgeplf/NeuroM,juanchopanza/NeuroM,eleftherioszisis/NeuroM,BlueBrain/NeuroM