switch for PyYAML, change matplotlib for ax

[wurstBrotMitSenf]

Hey, thanks for your project - i tried to run it and encountered a few issues for me to fix. namedlists and yaml lib being outdated. in case you want to use it, kindly accept the PR.

kind regards chris

[utkuufuk]

Hey Chris, I haven't been maintaining/using this for a very long time. Feel free to fork it and make any changes you want!