* Billiards mines! With support for both above and below water, replacing both the below-and-above-water old mines at once.
* Explosion executors.
* Minor refactor of P_KillMobj.

Merge branch 'master' of https://git.magicalgirl.moe/STJr/SRB2Internal.git into hardcoding-time-again

[13:01] toaster: would anyone object if i pushed this to master
[13:02] toaster: so my changes to devmode don't fuck with gifs, for example https://cdn.discordapp.com/attachments/428262628893261828/432500920773771264/srb20575.gif
[13:02] NEV3R: ¯\_(ツ)_/¯
[13:02] toaster: ok i'll just do it

Delag Maces

See merge request STJr/SRB2Internal!141

# Conflicts:
#	src/p_mobj.c

NiGHTS Objectplace: Preserve MT_NIGHTSBUMPER vertical angle upon WRITETHINGS

See merge request STJr/SRB2Internal!137

Texture fixes

See merge request STJr/SRB2Internal!135

Merge branch '100-make-slopes-static-by-default-and-require-flag-to-turn-them-dynamic' into 'master'

Resolve "Make slopes static by default, and require flag to turn them dynamic."

Closes #100

See merge request STJr/SRB2Internal!140

Pretty stuff

See merge request STJr/SRB2Internal!131

# Conflicts:
#	src/hardware/hw_draw.c

# Conflicts:
#	src/f_finale.c
#	src/hardware/hw_draw.c
#	src/hardware/hw_main.c
#	src/hardware/r_opengl/r_opengl.c
#	src/sdl12/hwsym_sdl.c
#	src/sdl12/i_video.c

* Make sure showfps never covers anything relevant to the base game.
* Tweak spectator text for raising/lowering.
* Minor code-smell squishes.

* Fix that one comment Digiku mentioned. ;P
* Make extra lives/100 ring rewards consistent between lives being relevant and lives being infinite/not present, which was a problem this branch made evident when Race ended up getting the infinite lives symbol!

This reverts commit 8bd91bd2.

Note to self: read through the fucking merge requests

Feel free to reorganize as necessary.

Opengl Quick Fixes

See merge request STJr/SRB2!237

* Optimise them even further... AGAIN! Using an offset-based system rather than a multiplication-based one...
* Again, tweak the spawning code to take maximum advantage of these gains.
* Fix potential crashes with MT_NULL mace/chain types supplied.
* #ifdef out the height-clipping code. It needs more TLC than I can give it right now, and the existing behaviour is less obviously broken (sadly enough).
* Fix chainmace points, which were apparently broken without anyone realising.

* Revamp mace creation again to potentially serve as the foundation for further optimisation (and also not rely on a while (1) loop, which easily went wrong several times whilst I was making changes to it).
* Fix minor typoes and other small tweaks in the P_MaceRotate function, which I'm probably about to rewrite again anyways...

* Completely rework how mace/chainbars are spawned to reduce the number of matrix multiplications required EVEN FURTHER!
* Reimplement the maceretry solidity stuff (effect 4).
* Flip the mminlength stuff so that existing dev maps don't break badly.
* Fix hacky chainbar grabbing.
* Tweak height of tinychain a smidge.

* Fix ability to turn chains (still disabled by default, just at least want the option...)
* Replace max speed setting with a "minimum chainlink distance" setting - if greater than zero, that many chains will not be spawned from the center outwards. Doesn't affect the head of the chain at all, since otherwise what's the point? :V

* Handle all chain objects as a hnext/hprev chain.
* When removing mobjs with hnext/hprev, "repair the chain" (make the h links meet).
* Fix hidden slings, which I accidentially broke when I revamped maces the first time.
* Kill MF2_MACEROTATE. Not needed for anything anymore.
* P_MaceRotate now available to Lua to make up for it.
* Related: Made modifying hnext/hprev using Lua safer, so it keeps the reference counts in play.

I wasn't aware of the cvar, this should do for now since I don't believe any maps use these software tricks, probably an old leftover from DOOM.

* Tweak thrown ring colours.
* Make Armageddon shield loop properly.
* Tweak drowning numbers to be consistent between third and first person.

* Prevent ANY input when blindfolded.
* Make CECHOs always perplayer'd. (A little hacky; quads will need work here.)
* Make NiGHTS link timer bounces not a mess, and only when the colour changes.

I don't fully understand this, but it's what software does and it fixes the issue of the lighting in DSZ3. Also don't need the extra call to R_Prep3DFloors.

Signed-off-by: Nevur <apophycens@gmail.com>

* cv_powerupdisplay. Never, First-person only (default), Always.
* New monitor stuff.
* Fixed hitmessages.
* Some CTF stuff.
* Aaaaugh it's a lot I hate myself I need to work on my coursework.
* I'll figure out what I did here in the merge request when that's done.