[EM] A distance based method

[Kristofer Munsterhjelm]

Jameson Quinn wrote:
> I doubt it's monotonic, though it's probably not a practical problem. 
> That is, it would probably be totally impractical to try to use the 
> nonmonotonicity for anything strategic, and it wouldn't even lead to Yee 
> diagram ugliness.

Nonmonotonicity could be considered an error even with honest voters. 
The argument would go something like: "Okay, if we raise X, then X goes 
from winner to loser. That means that the method is either wrong about 
who should have won in the ballot set before we raised X (it shouldn't 
have been X), or after we raised X (it should have been X). We have no 
way of knowing which is the 'right' result, and so other results could 
also be suspect".