Fix an issue where completing a stage normally would not correctly set startrings for the next one (as opposed to warping directly or dying inside it).

This might LOOK like an unrelated change, but it needs a new player.dta, so might as well keep that all localised!

* https://cdn.discordapp.com/attachments/428262628893261828/621129794045870108/srb20077.gif
* https://cdn.discordapp.com/attachments/428262628893261828/621129785124585502/srb20078.gif
* I will be accepting no further questions at this time.

These have been in srb2.pk3 for a while, but they were inaccessible because of not having in-game references.

Change flipped starpostz to define the top of the player object, for cases where scale on contact with starpost is different to spawn scale.

Notably, can no longer use P_PlayJingle because of pre-fade.

* Store gravflip (resolves #206) and destscale in starposts. (Using the same field, taking advantage of the fact that object scale will always be positive!)
* Update the function signature of P_MixUp to accomodate both it and drawangle instead of doing it outside of the function.
* If the player is spawning from the start of the stage and it's from the ceiling, be in fall frames as requested (resolves #191).

* Comment out the notices that the two types of music are disabled (see issue #179; not a perfect fix, but good enough for now).

* Fix jingle captions dying immediately (caused by an S_StopMusic call in P_PlayJingle; resolved by modifying order of operations).

* 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.

https://cdn.discordapp.com/attachments/428262628893261828/618812279127015475/srb20069.gif

* Genesis-style love and attention to the death event.
	* Only visibly decrement lives/rings when you're respawning (or game over, see below).
	* Faster no-button-press respawn.
* Game Over specific love.
	* Animation of Level Title font coming in from the sides.
	* https://cdn.discordapp.com/attachments/428262628893261828/617692325438554132/srb20067.gif
	* Change gameovertics to 10 seconds instead of 15.
	* Make the minimum time before you can force going to the Continue screen longer.
* Accomodate death in MP special stages as a form of exit.
	* Don't have your rings or spheres reset when you die in a special stage, so that the stage isn't softlocked with the new harder limits.
* Fix a bug with CoopLives_OnChange where changing to infinite lives didn't force a game-overed player to respawn.

Also, two not-quite death things which nonetheless were relevant to change:

* Fix quitting a special stage having some of the shared spheres/rings disappear into the aether.
* Fix a warning during compilation for the Ring Penalty print.

Give the Spectator Eggrobos the ability to move left and right relative to their angle, with initial direction depending on MTF_OBJECTSPECIAL/MTF_AMBUSH flag presence. (May need more tweaking before putting in CEZ3)

Motor's new Eggman sprites, along with some other sweet bits of boss polish. What else can I say? Just play it.

Note that spawning a object within a random range does not fully work yet and crashes the game

Ported over from Kart