Refactor to use SDLApp

[hellerve]

We now have SDLApp in the Carp standard library, and they do almost exactly what I try to achieve with this library! This is great, because I just need to add a thin layer over the SDLApp bindings and can reduce the code anima is made of to a minimum.

[eriksvedang]

Personally I think you should use a bit of global state to get rid of the extra args to draw/setup/etc. That would make the use case for Anima even more clear as a no hassle and beginner friendly drawing library for Carp. No pressure though, it's your baby!

[hellerve]

Maybe, but I’d like to a

[hellerve]

What just happened.

[eriksvedang]

hmm? :)

[hellerve]

I was in the middle of a comment and wanted to abort it. Instead I sent it and closed the issue. Sorry about that.