This reverts commit 75633bde.

This reverts commit 6f9c48a3.

# Conflicts:
#	src/p_mobj.c

Has to be done manually in Lua. Use P_CreateFloorSpriteSlope, and P_DeleteFloorSpriteSlope when done with it.

Added RF_ABSOLUTEOFFSETS and RF_FLIPOFFSETS

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

dumpconsistency
allowjoin
joinnextround
restrictskinchange
allowteamchange
startinglives
respawndelay
competitionboxes
allowseenames
matchboxes
specialrings
powerstones
countdowntime
touchtag
hidetime
autobalance
teamscramble
scrambleonchange
friendlyfire
overtime
pointlimit
timelimit
basenumlaps
allowexitlevel
inttime
coopstarposts
cooplives
advancemap
playersforexit
exitmove
pausepermission
respawnitemtime
respawnitem
flagtime

tv_recycler
tv_teleporter
tv_superring
tv_supersneaker
tv_invincibility
tv_jumpshield
tv_watershield
tv_ringshield
tv_forceshield
tv_bombshield
tv_1up
tv_eggmanbox

- movement speeds are scaled with player scale
- spawned objects are scaled with player scale
- command accepts argument for thing num to set

Fix mapthing spawn height scaling improperly with the object scale; only special offsets should scale now.

Finishing off these changes; how a player moves vertically.

Still more complex than P_RingZMovement.

Ever wanted to move like a ring vertically?

Because P_XYMovement wasn't enough.

Ironically this seems slightly more advanced than P_RingXYMovement...

Ever wanted to move like a ring horizontally?

Also now destroys Egg Guard shields, and circumstantially Minuses

- Buffed crouch landing; lasts slightly shorter and cuts speed less
- Support for swimming! Knuckles has slightly different glide controls when he has swim sprites underwater
- Improved glide controls in 2D mode
- Super Knuckles perks: land from a glide or latch onto a wall to generate a shockwave and damage nearby enemies
- Refactored skid dust
- Made super sparks use FF_FULLBRIGHT
- Added P_SpawnSkidDust and P_Earthquake to Lua