Add support for segno reading

[SemitoneGene]

Segno are now read and made available in the public API.

[SemitoneGene]

I also made a fix to catch.h in cpul that was causing a crash when building on the M1.

[SemitoneGene]

Coda reading added as well.

[SemitoneGene]

Added rehearsal reading.

In typical Gene fashion, I just realized all these changes only deal with reading. I am working on getting the writer work done.

[SemitoneGene]

I stubbed in the writing functions, but need to do some more work to understand the correct way to write the info out. Any help is appreciated!

[webern]

I'll take a look.

[webern]

Your commit history lol 😅

Don't push anything else ATM, I'll fix it.

[webern]

I think I fixed the git history at least. I force pushed to your fork and branch (because you can do that with GitHub, it's crazy).

So, Assuming your fork is at "origin", you should:

cd mx
git remote add upstream git@github.com:webern/mx.git
git checkout master
git fetch upstream master
git reset --hard upstream/master
git push origin -f master
git fetch origin gene/351
git checkout gene/351
git reset --hard origin gene/351