pnCCD side analysis notebooks

Dear Karim,

Could you please do me a huge favor and review these 3 notebooks and merge them when you are able to do so?

They do not need to be processed using xfel_calibrate, as they are interactive and will not run nicely if one runs them without changing a few things related to fitting peaks.

Thanks very much and sorry for making too much work for you. Best Wishes, Kiana