This is by no means complete or final and is open for others to work work on. Feel free either to comment on this issue or to edit the file directly if you are able.
We should rewrite all simmat functions to dismat, both in similarity.py and in every viewer. It has been done in sim_to_dissim branch. I'll merge it to develop if it looks ok.
https://github.com/inpho/vsm/blob/master/roadmap.txt
This is by no means complete or final and is open for others to work work on. Feel free either to comment on this issue or to edit the file directly if you are able.