Added missing base client creature speech sounds.
WoW-MoP-5.4.8-Mute-Creature-Speech-v2.zip - mutes all creature speech sounds.
WoW-MoP-5.4.8-Mute-Creature-Speech-not-NPC-v2.zip - mutes all creature speech sounds, except generic NPC speech, e.g. allows Goblin greetings.
WoW-MoP-5.4.8-Mute-Creature-Speech-NPC-only-v2.zip - mutes all generic NPC speech, e.g. disallows Goblin greetings.