WIP: adds option to use weights as timeseries in goal_programming_mixin_base
Adds option to use weights as timeseries in goal_programming_mixin_base next to the use of scalar goal weights. Scalar goal weights should be positive, while timeseries-values should be nonnegative.
TODO:
- write function to make the correct constraints.
resolves #1038
Edited by Sjoerd Geevers