Rearange structure and update notebooks

...ts/1. Introduction to ACTRIS Jupyter Hub-checkpoint.ipynb

...2. Search with ACTRIS Metadata Rest API -checkpoint.ipynb

...heckpoints/3. Access ACTRIS In-Situ Data-checkpoint.ipynb

.ipynb_checkpoints/4. Access EARLINET data-checkpoint.ipynb

...oints/5. Ultrafine particles (DVAS lev3)-checkpoint.ipynb

1. Introduction to ACTRIS Jupyter Hub.ipynb

2. Search with ACTRIS Metadata Rest API .ipynb

3. Access ACTRIS In-Situ Data.ipynb

4. Access EARLINET data.ipynb

5. Ultrafine particles (DVAS lev3).ipynb

dev/.gitkeep

dev/.ipynb_checkpoints/Access ozon data -checkpoint.ipynb

dev/Access ozon data .ipynb