Installation instructions:

• run the zip.py, by typing into a command prompt py zip.py, this generates a .zip archive.
• launch Blender, Edit->Preferences->Addons->click Testing->Install-> locate the .zip file, press Install
• we can now find the addon in these menus:
  File->Import->"HxA (.hxa)"
File->Export->"HxA (.hxa)"
  From there you can import and export HxA files, like you would any other 3D format.
  

Features supported at the moment(what can be imported and exported alongside a mesh):

• Armature and weight vertexes(if any)
• Shapekeys
• Edge creases
• Custom properties