Revise A/E routines

[theHenks]

Follow CM's advice and include a drift time correction in the A/E routine. Here, in general, two options are possible:

• Do a combined fit for the Compton bands and optimize for minimal sigma function.
• Combine all "calibrated" A/E distributions of all Compton bands and do one global max{peak_height/fwhm} optimization as in the CTC algorithm for the energy

In general, the routines have often times stability problems, so I think there is no way out of the combined fits. @fhagemann Can you have a look into this? If not, I would take care of it and then see how far I will get here. Also @LisaSchlueter might have a look here. There are definitely already code snippets available for doing such combined fits.

[theHenks]

@gipert

[gipert]

done