Organise textures_sprites.c with macros (#392)

* Update object_functions.c

* step 1

* stage 2

* stage 3

* Update particles.h

* stage 3

* Update particles.h

* Update particles.h

* gave preliminary names to things that have obvious looking properties

* rename camera strusct cars

* last minute changes

* rename draw commands

* Add macros for render mode tables

* rename

* Make them grouped entries

* fix some oopsies and name the draw tables

* funny flag

* name another flag

* comment render modes

* Update objects.c

* water

* Fix oopsie regarding viewports in tracks.c

* rename unknown_B7B30.c

surprised I hadn't done this earlier

* Fill some gaps I should've filled in yonks ago

* Try again with the assert rename

I should've known there was already a file called that lol

lib/src/al/env.c

@@ -24,7 +24,7 @@
 #include "types.h"
 #include "macros.h"
 #include "audio_internal.h"
-#include "unknown_B7B30.h"
+#include "audio_assert.h"
 
 // TODO: these come from headers
 #ident "$Revision: 1.17 $"