Config: Added the config file for the Neptune plus

[douglascoenen]

Added the dictionary and json file for the Thermo-Fischer Neptune Plus instrument.
Also modified the latools.cfg to add the config files under the config name: "NEPTUNE".

[oscarbranson]

Thanks very much for your input, @douglascoenen!

Quick question: how confident are you that this file format is universal for all Neptunes? If there's a chance it might vary, could you rename your config entry and dataformat file to be institute-specific? For example, see how the 'ANU-iCAP-RQ' file is named. This will avoid potential confusion later.

[douglascoenen]

My pleasure!
I have absolutely no idea about this, I will ask around my institute, especially the technicians, if there are some differences.
Actually, there is a small mistake in the regex for the column_id. I realised that the one that I just submitted does is for "Mass Name" followed by "Mass Number", but the raw Neptune plus output is actually the reverse. I know you have a small function to reverse it, but I am just better off changing it manually here.
I will change the name to NP_GU, is that better?
I will submit the changes to it soon.