Add new hull and core system Blender source files.

[V-ktor]

Add the .blend files for the new core system and hull icons.
Note that Blender 2.82 was used to make them. These files cannot be opened with previous versions of Blender.

[ids1024]

Thanks!

Note that Blender 2.82 was used to make them. These files cannot be opened with previous versions of Blender.

The other .blend files in the repo currently only work properly in earlier versions due to Blender Render being removed (plus the scripts rely on removed APIs, #10). But that's fine for now; they should all be updated to work with the latest version.