New Python wrappings
I0estimation is now inplace
correct I0 estimation for flat fields
update raw-to-attenuation minipileline: add i0 and bin
Boellaard fix for projection stack with non-zero first index
Add I0 estimation and more filters in raw-to-att mini-pipeline
Style fixes
Merged rtkimagxgeometrytest into rtkimagxtest, updated data with latest
version of the imagx processing pipeline