Handling error when problem is infeasible on frontend

[martianbug]

Hey, just a little suggestion for @vperron : when the algorithm fails for whatever reason (I'm still testing an algo that doesnt really work yet), just warning the user with the traceback of the error instead of 'unespected token'. I think I could fix it (let me know if you want ) but i didn't wanna interfere with your frontend jurisdiction ;)

[vperron]

Ahah yeah sure - This frontend is just a sandbox for now anyway but this is an easy fix.
You can go ahead and implement it if you want. Not sure we should display a traceback here though, users should go and check the python console errors and not have them bubbled up in the frontend.