Fixes extended sources skipped from the xml (wrong path was used)
Add option to preserve srcmaps for all sources (might accelerate the fitting procedure, but it is a pretty undocumented feature in the fermitools and requires some testing).
Fixed energy dispersion correction.
4FGL-styled binned analysis & energy bins fixes (tested/used in the CTA-POP task force).
Allow to add parameter value 'noise/deviations' in the xml so that the fitter does not get stuck in local minima (not necessary in most cases).
do not crash the plotting if a component is missing.