This reverts merge request !1309

This reverts commit 75633bde.

Fix P_DoAbilityBounce() always using "max",
instead of "min" while upside-down and "max" while not

This reverts commit 3dbb44e7

Revert "Fix no spin characters being able to damage enemies with their jump out of a spin without removing PF_SPINNING"

This reverts commit ad9bf608.

Fix no spin characters being able to damage enemies with their jump out of a spin without removing PF_SPINNING

- Added render flags (see r_defs.h)
- Implemented floor splats
- Drop shadow sprite rendering through render flags