MORE DETAILED DESCRIPTION LATER

The framework consists of four steps:

1. interpolation
2. feature engineering
3. clustering
4. regression learning

the necessary functions are in the respective scripts. an example workflow going through all four steps is shown in example_workflow.py

References: Bessenbacher, V., Gudmundsson, L. and Seneviratne, S.I.: CLIMFILL: A Framework for Intelligently Gap-filling Earth Observations (in prep.)