[REQUEST] Blender Feature: Batch JMA importing and Stashing

[Baconator650]

Requesting the ability to Batch importing and automatic stashing of the JMA as Actions for users who focus on asset art.

[KeithMcPherson]

I was able to get batch import working by adding files/directory properties to the importer, and just iterating over the list of files in load_file. I'd submit a pull request but I had concerns about what the arsv stuff is doing and didn't want to break anything. It's also very slow (~150 minutes to import all of the elite animations).