## Problem
OpenGOAL uses OpenGL 4.3.
Apple stopped upgrading OpenGL after 4.1, so the way OpenGOAL currently
works will never be playable on Macs using OpenGL.
## Solution
Luckily, downgrading to OpenGL 4.1 is not a huge change (at least it
doesn't seem like it to my untrained eyes).
## Changes
* set hints for OpenGL 4.1 instead of 4.3 for __APPLE__
* skip the OpenGL debugging callback setup for macOS (requires 4.3)
* bump down the version string for all shaders
* stop using the `binding` layout qualifier in shader code
* move the `flat` qualifier first (not sure if this is a 4.1 thing or
just Macs being more strict)
* don't mix signed and unsigned ints in shaders (not sure if this is a
4.1 thing or just Macs being more strict)
* add some hacky CPP to the Shader constructor for binding texture units
and bones buffers based on variable names in the shader code
## Results
* redo cheat encodings
* fix error
* add no texture cheat
* tiny cleanup + add sidekick stats button
* crappy implementation of big/small head mode
* more correct bone scaling
* redo bone manip code a bit
* jp text fixes
* improved matrix math!
* add big fist cheat, minor type cleanup, add some debug toggles
* move all this mess to a new file
* slightly rework joint scaling function
* add big head npc cheat
* subtitles typo
* WIP mirror mode
* fix mirrored hud sprites
* fix mirror mode sound pan
* add cheats to menu!
* split some subtitles
