Adjust the line identification

Code history:

2020-05-29: 07-LineID.py

To-Do: Use (and override) the existing order ID file if it exists

The video tutorial below shows how to use this python code to adjust the line identification for a new observation, based on the reference identification that is located in the 00-notebook-data folder. 

This code has to be performed for each order individually. It will read in the appropriate ThAr spectrum in the 07-ThAr folder (TODO change numbering scheme), and write the result in the 08-LineID folder. From the terminal, in the observing night folder: 

>> python 07-LineID.py root order 

where "root" is the root of the ThAr file (e.g. ThAr_3) and order is the order number you are working on (e.g. 9), thus for example:

>> python 07-LineID.py ThAr_3 9