Add wrappers for RenderSprites anims dictionary.
RenderSprites.anims is finally private.

Followup to #3348.
Support per-animation palettes.
Change Bib to use RenderSprites.
Add custom palette support to With*Overlay.
Fix D2K construction yard overlays.
Fix star port and repair depot lights.
Merge pull request #5393 from pchote/palettehax

Support per-animation palettes in RenderSprites.