german translation update
Added notes on merging pull requests based on Matthias's message in mailing list.
Added a little more debug info so show which projects were found and which default was used.
Further tweak to pull request docs.
[RASTER][Feature] Applying scale and offset to raster data - funded
Ifremer

An issue has been opened 5 mounth ago
[BUG] #8417 incorrect value loaded from netcdf file
The data has not be loaded incorrectly, but QGIS doesn't apply scale
and offset defined for each band.

This commit will apply scale and offset to GDAL Provider BandStatistics
and to RASTER block of data.