* This commit does not build. Committed items are everything that's been done by find and replace.
* Next commit has hand-performed changes that are better separated out for clarity.
* Went the el cheapo route and added some floating point Build angle methods. As these and the integer build methods are really just refactoring aids, we'll come back to this in due course.
* Since fvel/svel is clamped at the end of the function, these tests just aren't necessary.
* Reversed the logic in some if statements so the most likely outcome doesn't fall to the else branch.
* These class methods did nothing with the objects inside the class, they worked generically so they're better as inlines.
* Also tidied up some of the internals so they're easier to read.
* There were some plans around this being in use for all the various player structs in each game, but it hasn't come to be.
* Code remains in the commit history, it can come back if it's of use in the future.
* Controller input before was too fast compared to other games, now it's 1:1.
* Mouse input when used without mouse look was too slow, now it's also 1:1 with the other games.
* `hid` in the context of `hidprescale` refers to 'Human Interface Device'.
* In our older codebase before the input code was refactored, Exhumed's turning was broken and was only applying the base factor of 12, significantly slower than the other games.
* Upon doing some testing in PCExhumed, I noticed their turning was faster as when the counter meets its target, the turn value is shifted left by 2, effectively making it 48: b90417ed8e/source/exhumed/src/player.cpp (L336-L337)
* Removed this CVAR because of this.
* Reworked turning code so that pressing left+right together cancel each other out and that pressing both doesn't call `updateTurnHeldAmt(scaleAdjust)` twice.
* Redid turn averages factoring in Exhumed's speeds, rounded off values and stored in an enum for clarity.
* Remove unused `getincanglef()`.
* Remove unused `getincangleq16()`.
* In `PlayerHorizon` struct, clamp value when setting target in `__settarget()`, not each public `settarget()` overload.
* Rename `PlayerAngle` method `applylook()` to `applyinput()`.
* Rename `PlayerHorizon` method `sethorizon()` to `applyinput()`.
* In `PlayerHorizon::applylook()`, slightly clean return to centre code so it doesn't do math if already at 0.
* In `PlayerAngle::applylook()`, slightly clean rotscrnang/look_ang code so it doesn't do math if already at 0 and reposition where mouse input is applied so that if input is applied, the player never enters a spin.
* In `Duke3d::player_struct::apply_seasick()`, use `buildfang()` method instead of scaling float to BAM within function.
* Added in fca846272e to deal with signed adjustments but its just not needed.
* Made better use of `binangle`/`fixedhoriz` class getters and setters than before as well.
