Eoreader

- Bug when reading cloud mask on Linux
- Log update in `product._check_dem_path()`
- README & documentation updates

- Do not use psutil in requirements and setup.py
- Typo in setup.py

- In case of DEM bands, checks if the DEM is set and exists and raise an exception if not
- Setting minimum versions in setup.py and in requirements.txt
- ReadMe improvement
- Updating docs

- Bug in NDVI formula, typo when passing to xarray

- Correcting a broken link in setup.py
- Setting a minimum version of sertit
- Footprint:
- Fixing a bug in the default function
- Optimization for S2 and S2-Theia sensors
- Fixing L7 footprint which was too complex due to nodata stripes
- CI:
- Testing footprints and extent
- Resolving non update of gitlab documentation
- Changing the resolution of CI processes (to a multiple of the real resolution to speed up the computation)

- Multiple optimizations when reading and processing the bands
- Bug resolutions:
- S2-Theia masks
- SAR DSPK bands always recomputed
- SAR nodata set to 0 as SNAP expects it
- Bad mask nodata setting when computing invalid pixels
- Inverted default resolution between L4/5 MSS and TM sensors
- Removing useless logs when missing DEM but no computed DEM bands
- Adding copyright headers to every python files
- Fixing and adding examples