Updated images for Emperor's Guard, Blight, and Holy Order

[ProditorMagnus]

Issues that must be handled before merging:

• [ ] intentional blight resist change?
• [ ] check for removed/added units and update unit lists
• [ ] check for invalid images
• [ ] ME heroes
• [ ] add images to resources addon
• [ ] MAGENTA_IS_THE_TEAM_COLOR

[ProditorMagnus]

Emperorsguard.zip holy_order.zip blight.zip Original files as I received them. Those also remove refugees for some reason.