[aquaria] [patch] Positional audio support

[False.Genesis]

Here's the last missing bits for my last patch.
Blame me for beeing lazy, didn't change each script using entity_sound, 
but used a crappy hack to fix it. Should still be okay if this function 
is now officially deprecated in favor of entity_playSfx.

If anyone thinks that some entities sound wrong now, please go ahead and 
adjust the pitch. Nevertheless it's cool to hear how they were intended 
to sound. :)
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