Moving MacPorts to the x.y.z version format internally for 1.7.1/1.8.0

[Juan Manuel Palacios]

	And, of course, reading my message a good number of times to assure  
accuracy still did not clear out all bugs!

> If we do it by 1.7.0, then it'll be 1.700.0 against 1.7.1, and I'm  
> unsure of the result (though my guess is 1.7.1 < 1.700.0, which  
> would also fail).


	There I meant "if we do it by 1.7.1", of course.


-jmpp