* If using twinspin and have melee ability too, go into melee landing when hitting the ground.
* Only have melee go directly forward if standing/idle, otherwise use drawangle.
Glide speed now starts at whatever speed you were traveling at prior.
If glide speed is below actionspd, the glide accelerates towards it.
When landing from a glide, player now enters a landing animation (SPR2_LAND); they cannot move in this state, but they can jump or start a spindash.
Ground-sliding after a glide can now be cancelled into the landing animation by releasing jump, where the same rules apply.
Climb speed increased x1.33.
* Prevent being able to damage enemies from below while swimming.
* Make the swim-specific bubbles happen at the hands instead of where the propeller would be.
* Improve placement/angle of swimming tails overlay.
* Immediately set flight time to 0 if a player is being carried underwater.
* Fix S_PLAY_FLY_TIRED animation being fast.
* Add moving tails to S_PLAY_SWIM animation!
* Fix autobrake happening when your controls are locked by pw_nocontrol/PF_STASIS. (Resolves#219, hopefully..?)
* Put everything in P_DoJumpStuff, instead of half in that function and half spread across the player thinker.
* Have a proper if else cascade that first tries shield abilities, then super transformation, then random abilities like CA_TELEKINESIS.
* Use this new arrangement to allow CA_TWINSPIN users to use their ability on spin if their secondary ability is CA2_MELEE (resolves#195).
* Random bugfixing. Didn't keep track of what I'd caused while working on this and what was already there, but there was a lot of it.
The only two abilities which have spin-button properties outside of the else block is CA_AIRDRILL and CA_FLY/CA_SWIM (which now also prevents you from swimming down in goowater).
* Don't allow the stage to be reloaded in G_DoReborn.
* If you do ANY spawn after the very beginning moment, you're forced to be a spectator.
* Have the "%d player%s remaining" Co-op exiting count visible at the same time as spectator controls.
