custom functions/customize existing functions

[JonathonMSmith]

users should be able to freely define the way terms in the growth rate are being calculated. Try an implementation similar to pysat for custom functions.

[jklenzing]

Is it possible just to import the custom function from pysat? Maybe not just yet, but once the operational version is released, this might be simpler.

[JonathonMSmith]

Hmm, that would be very cool. I can't see why not. It might need some tweaking, but I'm not sure. I'll look into it.

[jklenzing]

Since pysat is in flux between 2 and 3, this might be a future version. The biggest problem will probably be the ton of dependencies pysat currently has.