Mahid Sheikh

Finally got this in (though it took a bit of pain as Blender's matrix transforms are weird)

Also I just realized this PR is reported to be larger than the actual changes, probably due to that accidental squash merge. We should probably revert that squashed commit, then...

Updated this branch with the remerge in `dev`. Sadly, we still have some extra commits, but it should be more manageable now EDIT: correction, I just remembered that we merged...

@TheDuckCow we're good to go for review. Just a forewarning that there's bit more stuff to review now as #549 was merged into this branch 2 weeks ago.

Prefacing this by saying that all rigs in MCprep are community maintained. UV issues seem to be an oversight with how the rig was made, so I'll add that to...

> Some code during the merging is mess up at some spot and not tested so I want to see how it should be structured from this draft. > >...

Able to reproduce, it seems like the head is hidden when `mad` is set: 

Able to reproduce on my end. Rigs are community maintained however, so although this will be marked as a bug, someone in the community has to fix it

V1 has finally been implemented, here's the 1.0 release of cmc2OBJ: https://github.com/CommonMCOBJ/cmc2obj/releases/tag/v1.0

I've been working a bit on this, and it seems like it won't be quite straight forward. In particular, contrary to what I initially assumed, keeping the explicit exporter options...