Some optimization improvements. Potential memory leaks to look at. Many improvements in the preprocessing scripts, almost finished the parcel mode. New scripts in the prostprocessing directory. Changes in the samir parameter handling.

Various modifications in preprocessing codes. Improved datachunking, corrected bugs in weather dataset download, small improvements in script speed. Added a notebook to help prepare landcover and soil data for pixel mode

Started working on modspa parcel mode. Rewrote pre-modspa functions for better integration to modspa pixel. Improved efficiency and simplicity at the same time.