Add feature to loglib: Logging to variables (no file, no stdout)
Fix freshly introduced bug with logging
Rewrite SF6_calibration in order to make it importable as a module. Changes in fitlib and loglib accordingly. Add __init__.py in order to make it a module.
Rewrite SF6_calibration in order to make it importable as a module. Changes in fitlib accordingly. Add __init__.py in order to make it a module.