FM-1523: Added module summary to metadata.json

Sound fair to me, but I grabbed that snippet from the Overview section of the readme. So if it's not really right, that probably needs to be changed as well. 

That said, "manages" is pretty vague... can you tell me in a few words what the module does besides install? That way I can fix the Overview section of the readme as well. (Unfortunately, I don't have time right now to go over the entire readme just now, but I can certainly fix an incorrect description.)