Invisible NPCs and Aggro

[Fyreflyte]

<p>The following bugs are known, and we're in the process of getting a code fix out for them:</p><p><ul><li>Invisible NPCs will aggro on mercs.</li><li>Invisible NPCs will assist visible ones when a player aggros them.</li></ul><div>You don't need to report these issues on a per-quest basis for now. If they still occur once the code fixes have gone in, you may resume bugging =)</div></p>