Extend module description in README to make it easier to understand for new users?

[petterreinholdtsen]

When looking at the module list in my FreeCAD module manager, I only find "Overlay dock widgets over viewport." explaining what the Glass module is for. I am sad to say I am unable to gain any meaning from the description. Could it perhaps be extended a bit more to explain also for the untrained reader what the module is useful for and who its target group is?