Mob refactoring.

Updates Bump() code.
Intents now use constants.
Simple animals can now use languages without overriding say().
There is now a difference between being able to smash normal and reinforced walls.
Reworks simple_animal/attackby so that constructs don't need to override it simply to add damage resistance.

code/modules/client/preferences_toggles.dm

@@ -182,7 +182,7 @@
 	icons.Add(usr.zone_sel)
 
 	for(var/obj/screen/I in icons)
-		if(I.name in list("help", "harm", "disarm", "grab")) continue
+		if(I.name in list(I_HELP, I_HURT, I_DISARM, I_GRAB)) continue
 		I.icon = ui_style2icon(UI_style_new)
 		I.color = UI_style_color_new
 		I.alpha = UI_style_alpha_new