Add units when converting to intermol.
Add units when converting to intermol.

sallai/mbuild,tcmoore3/mbuild,Jonestj1/mbuild,summeraz/mbuild,iModels/mbuild,summeraz/mbuild,tcmoore3/mbuild,ctk3b/mbuild,iModels/mbuild,sallai/mbuild,ctk3b/mbuild,Jonestj1/mbuild