Plane scroller & wind/current/pusher improvements (again)
Does the same as !1705 (closed), except UDMF already implemented the new features properly, so this branch simply gives the binary map format access to them.
From the previous merge request:
- Adds new linedef actions 516-518, 526-528 and 536-538, for scrolling/carrying both floors and ceilings simultaneously.
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Plane scrollers, wind, current and push/pull linedefs without a tag will now affect their frontside sector.This is already implemented! - Additionally, checking the Effect 6 flag on these actions allows setting the scrolling/carrying/pushing speed/strength via the front X offset, instead of the linedef's length.