Remove large files from ZEPHYRUS git history

[timlichtenberg]

Remove large files from ZEPHYRUS git history.

[nichollsh]

I did this previously for Aragog and PROTEUS. Steps should be outlined somewhere on GitHub...

Main thing is to identify large files see here and then use a repo cleaner to remove them from the history see here. This requires everyone to then re-clone any local git repos of ZEPHYRUS.

[timlichtenberg]

when doing this we should also add a pre-hook to prevent this from happening again. especially imprtant, as we will use zephyrus now with some BSc students, and there is a bit of a danger they will add large files by accident

[nichollsh]

Good idea. We can copy the hook from PROTEUS, and maybe consider applying it to the other modules too.