Rename `master` to `main`?

[chriscn]

Renaming the master branch seems to give good reasons for renaming it.

I would be in favour of renaming.

[celsworth]

I don't have strong opinions either way, I'm not opposed to it. I tend to think admin like this is a lot of effort for little reward, so its not very interesting to do, I much prefer coding :)

I'll leave this open and on the back burner and do it one quiet evening :)