Is there a nice library for representing Time differences?  I mean it's 
nice it returns the number of seconds between two time objects, but is 
there say a nice class which takes this time difference and allows you 
to manipulate it nicely, or call some from strftime on it?  I tried 
pumping it back into Time.at, but that makes all your time differences 
have 18 hours.  Any suggestions on this?
	Charles Comstock