ranghetti/sen2r: Version 1.3.7

Major changes

• Some additional products are now supported: CLD, SNW, AOT, WVP (see documentation for description). The GUI and internal functions were modified to support their selection and generation.

• Add indices Red / Green / Blue Chromatic Coordinate (Rcc, Gcc, Bcc) and Excess Green (ExG) (#330).
• All methods based on runtime GDAL are now discouraged and never called by default (before this version, they were used in case GDAL was found on paths.json).
• Output GeoTIFF files are now tiled.

• New products were documented in function references and in the article "Output file structure".
• Function references explicit discourage the use of GDAL-based methods.
• The documentation site links to the personal page https://luigi.ranghetti.info/.

• Fix #318, #323 and #329.