Refactoring

[KimNikita]

Repo structure must be like this: src--> ------assets--> ----------------map.html ----------------map.json ------datasets--> ----------------landsat_data_reader.py (old data_reader.py) ----------------landsat-8_downloaded ----------------sentinel-2_downloaded ------demos--> ----------------cloud_segmentation.py (old cloud_segmentation_pipeline.py) ----------------fire_detection.py (old fire_detection_pipeline.py) ------models--> ----------------cloud_net.py ----------------kumar_roy.py ------scripts--> ----------------landsat_downloader.py ----------------landsat_cropper.py (old landsat_cropper_demo.py) ----------------sentinel_downloader.py ------design.py ------main.py ------README.md