Make evaluator robust to comments

Adding a " #comment" after a test definition in the config leads to setting plot=True in the respective line. Commenting should either be possible or ignored.

Try this config on ressources/data/data.csv to reproduce the issue:

varname;test;plot
SM2;range(min=-20, max=60);False #mycomment
SM2;spikes_simpleMad(winsz="30d", z=3.5);True

This should not produce three but only one plot.