Commented and changed centroid function.

See merge request !196

- hot pixels 0 after dark subtraction, if masking is used
- hot pixels dark mean if masking is used but dark subtraction is not

Modified and commented dark_load

See merge request !194

Modified and commented dark_load

See merge request !193

Centroid function modified to always output spectra

P2866 updates darksubtraction

See merge request !192

Merge branch 'p2866_updates' of https://git.xfel.eu/gitlab/SCS/ToolBox into p2866_updates_darksubtraction

Centroid subtracts dark image if there is one

See merge request !191

centroiding is not always fine

this might be wrong and thus confusing

do not store the data in our own class, employ xarray for that.

See merge request !178

Fluence calibration

See merge request !180

it is not so clear to use

hRIXS functions

See merge request !170

Fix bin DSSC script

See merge request !177

Improving SLURM based notebooks and scripts

Closes #47

See merge request !176