Fix sign of XAS

To get the sign of the XAS right (positive absorption peak) we used to look at the name of the channels.

This MR looks at the sign of the average Io and It signal to determine the correct signs.

Closes #61 (closed)

requested review from @mercurio

assigned to @lleguy

added 1 commit

• 008e11d0 - Update changelog

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marked this merge request as ready

mentioned in merge request !208 (merged)

LGTM

LGTM, I'll merge it now :D (and TIL about the fix, will mirror it on the the XasProcessor device)

merged

mentioned in commit 2cede8d8