Mapthing tweaks (object_tweaks division 1)

See merge request STJr/SRB2Internal!396

Fix player state resynching

See merge request STJr/SRB2Internal!393

Fixed a netgame crash that was caused by a closing brace being in the wrong place :v

See merge request STJr/SRB2Internal!395

* Make the Amy Cameo only spawn in SP, Record Attack, or Co-op unless it's the Clone Mode.
* Add the diagonal spring flag options Red and Yellow Diagonal Springs have to the Blue Diagonal Spring as well.
* Put diagonal blue spring in config.

Fix missing & which I totally forgot about in writing this fix (yes this is the "compile error" everyone was talking about)

Fix sprite-related console errors that occur in netgames whenever the game attempts to synch the player's state.

Turns out the code was using P_SetMobjStateNF to "fix" the player's state ...which got things all wrong, lol.

Fix clients being resynched at the wrong gametic

See merge request STJr/SRB2Internal!391

Better than not updating it at all and having a inconsistency between versions reported from the header and internal lib version.

Make shatter blocks solid to non-players

See merge request STJr/SRB2Internal!379

Add ZB config to the repo

See merge request STJr/SRB2Internal!381

Fix reverse gravity cacti (and all other A_ConnectToGround stuffs)

See merge request STJr/SRB2Internal!378

Fixed NiGHTS spawnpoint angle camera jump fuckups

See merge request STJr/SRB2Internal!376

Hide NiGHTS grade in singleplayer if ranking is below GRADE_A

Closes #250

See merge request STJr/SRB2Internal!377

(Resolves #250)

Make ACZ3 Boss damage while bouncing more lenient

See merge request STJr/SRB2Internal!375

Add scroll-wheel weapon changing to default controls

Closes #248

See merge request STJr/SRB2Internal!374

Fix bogus "requested skin not found!" print

Closes #247

See merge request STJr/SRB2Internal!373

Fix for A_ConnectToGround on gravflipped objects

See merge request STJr/SRB2Internal!372

Kart-port bugfixes (round 1)

See merge request STJr/SRB2Internal!371

Fix condition which was MEANT to allow attacking Fangboss from the side while bouncing, but instead made it extremely difficult to pull off.

(resolves #248)

Also, since I'm less paranoid now - readd the skin number to its print.

On the recommendation of Sryder, revert everything relating to the `cpusleep` changes except for the new default value of 1.

Mixed declaration + out-of-bounds GCC error fixes for OpenMPT fixes (can't believe I didn't catch the former earlier)

* Default to 1, which means potential for a 1-frame loss every once in a while but no longer a complete cpu hog
* New minimum is 0, since -1 just did the exact same thing as 0 except slightly more optimized.