Ecoic distance measurement

[AFrancoB]

The visualize code is very sexy and all that but it doesn´t show nearly enough information that it could be showing that might provide a more complete experience of the possibilites of temporal canons. We can think of two fundamental sets of data, the first is the ecoic distance between voices. This can be easily implemented however a cool visual representation is still pending as it would mean additional parameters to the visualize function.