v1.5.0

Better support Cura and note detected slicer in output

Adds support for Cura 4.13, which changes the metadata format somewhat.

Also adds a post processing script that can be used in Cura(tested on
Linux with Cura 4.13). Install to `scripts` directory under Cura
resources, e.g. `~/.local/share/cura/4.13/scripts/`.

Finally, we now append a comment to `post-process` output with tool
version and detected slicer.