Matched z_player_lib (#499)

* Darkmeiro decompilation

Bg_Gnd_Darkmeiro decompiled, matched, and documented.

* give this a shot

* fix conflict

* one more try

* could be useful

* whoops

* ZAP2 stuff

* ZAP why

* ZAP again

* anohter match

* .s

* comments

src/code/z_view.c

@@ -523,7 +523,7 @@ s32 func_800AB944(View* view) {
 }
 
 #ifdef NON_MATCHING
-// regalloc differences
+// regalloc differences, skips a t register at arg1's assignment
 s32 func_800AB9EC(View* view, s32 arg1, Gfx** gfxp) {
     Gfx* gfx = *gfxp;
     GraphicsContext* gfxCtx = view->gfxCtx;