HIC/WL changed the quality code

[stijnvanhoey]

When downloading new data from waterinfo.be with the origin from HIC, the disclaimer provides new validation codes:

HIC Quality Code Interpretation
6-8 External validated data (6=good, 7=estimated, 8=suspect)
10-19 Good measurements
20-29 Good calculations
30-39 Estimate measurements
40-49 Estimate calculations
60-69 Suspect measurements
70-79 Suspect calculations

110-179 Unchecked

221-223 Unknown (import)
255 of -1 Missing

Need to have a check and do an update of the documentation.