some additional comments and code-tidying

simplifying the import required to a single statement by putting generate_all_jobs within the job_runner file

reverting code to run in the standard way (running with overwrite as false, etc). Removing redundant code from EnvSuitPipeline.py

import and shell script changes to use new plotting and met_extractor (now met_processing) package structures

EnvSuit pipeline update, to handle cleaning, job generation, and multiprocessing in a more direct way.

- dedicated run functions,
- work folder for each run,
- hadling multiple post processes so not just NAME data can be use as an input,
- general tidy up the code.

Updating Env Suit v2.0 calculation. Copied from operational EnvProcessor.py in master branch. Not tested for this commit.