Merge my image processing branch to main

[murraycutforth]

@codercahol A couple of bits of info for you about the layout of code I've written:

• I've added a new code sub-directory called "data_exploration" which has scripts I used to generate the plots on the wiki
• I've re-named and slimmed down the image_processing.py file to run_well_segmentation_preprocessing.py, now this just calls the well segmentation library and caches a bunch of numpy arrays for future re-use. We can re-run this periodically when new data arrives.
• I've started compartmentalising logic for creating masks and Fv/Fm values in new files in the lib directory

Because most of this is new files rather than edits, we can auto merge :) I'll just let you have a look first before pulling the trigger

[codercahol]

Looks good to me. Basically as we discussed, I want to remove the duplicated functions but we can do that as a next step.