Flexible non-judgment value

[Garrafao]

Currently, the pipeline interprets judgments of 0.0 as non-valid. For label ranges including 0 as valid label, such as cosine similarity ranging from -1 to 1, this leads to wrongly treating 0.0 as non-valid label. Thus, we need to make the non-valid label a parameter.

[Garrafao]

This was solved with the last commit. The parameter 'nonvalue' specified in the input parameters file now controls this. E.g. here: https://github.com/Garrafao/WUGs/blob/main/scripts/parameters_system2.sh .