What changed in EDuke32, build by build

Use a 16-gon instead of an octagon if an ART sky has >8 panels

Fix smoothness of q16 mouse aiming

Address an oversight in r4600.

Correct an oversight in r3580.

Revert part of r5481. We can't rely on the sprite trackers to tell us when tsprites change.

Fix the oversight in handling tspr->extra from r5400 by setting it to zero in polymer_scansprites.

upload bucket indices through pinned host memory.

fix regression with Y-flipping bit.

add preliminary support for batching draws.

fix synthesis warning.

store map data in a single buffer with a unified vertex type.

fix rendering of middle part of 1-way masked wall.

Account for HICTINT_APPLYOVERALTPAL and HICTINT_USEONART.

include wall[].ypanning in wall invalidation logic.

don't draw masked walls with void tile. DONT_BUILD.

disable normal/parallax mapping in rotatesprite.

factor out polymer_invalidateartmap(), use it in invalidatetile().

factor out polymer_invalidatesprite(), use when viewscreen tex changed.

invalidate a wall when its sector's visibility has changed.

fix ANM playback.

in model preprocessing, implement cos/sin by table lookup.

slightly more complete handling of (multi-tile) ART skies.

Fix one-sided y-flipped floor-aligned sprites, introduced in r3776.