Paths in artboard names aren't respected

[jctrouble]

With the built-in export (File->Export), if your artboard has a name like "foo/bar", then the artboard will be exported in a subdirectory called foo, aka foo/bar.png.

However, when running the plugin via Plugins->Sketch Image Compressor->Export All Assets, this information is lost, and the files are simply exported with the filename, i.e. bar.png.