Update of readme

Closes #62

See merge request !38

Resolve "Update the Grids configuration"

See merge request !37

Resolve "Create test for process_data"

Closes #59

See merge request !35

Resolve "Change names of the methods"

See merge request !33

Resolve "DRY the code, remove duplicate functions that are used in both tropomi/viirs"

Closes #55

See merge request !32

Resolve "Split functions into smaller functions"

See merge request !31

Resolve "Include a CHANGELOG"

Closes #54

See merge request !29

Fixing to da and tests

Closes #52

See merge request !30

Updated day end

See merge request !28

Resolve "[TROPOMI] Implement process_lazy_data for Tropomi also"

Closes #50

See merge request !27

Update where and when time domain selection is done as to not impact qa function

Closes #49

See merge request !26

Corrected bug when saving into netCDF processed data (averaged data)

Closes #53

See merge request !25

Resolve "[TROPOMI] QA greater than function for the tropomi QA value"

Closes #36

See merge request !23