Bugfixing and adding start for supersapling...
Added feature to choose number of bins manually.
Small Bugfixes...
Changed version to 2.1
Feature: distance can now be selected to be fitted or fixed (unchecked checkbox)...
Bugfixing and logic fixing the polarization correction:

Checked again everything against fit2d. Polarization does not need to be inverted. pyFAI seems to work as intendend.

Another missing line caused the polarization correction to be actually not applied at all.

Everything should be working correctly right now!
Controller now use appropriately get_img when plotting and get_img_data or get_data or img_data when doing calculation

still broken since calibration geometry returns wrong circle on the img plot
Circle in image view is now shown correctly even when supersampling
For now supersampling only works on spectra not on cake...
Filebrowsing still broken...
small improvements for the circle and vertical line in the integration widget
supersampling feature should now also work when using masks and calibration does not care about supersampling
More bugfixing and finetuning of supersampling
updating tests
Updating calibration tests for saving and loading calibration files