Added addon message for SMSG_SPELL_FAILED_OTHER

[zelazrgn]

Ugly solution for #255

Since SPELL_CAST_FAILED is not triggered by SMSG_SPELL_FAILED_OTHER for some reason

Hopefully there is a better way to fix it.

I'm not sure if the ToUnitGUID is correct and I still need to add things like pets

[ratkosrb]

We shouldn't have Hermes send custom addon messages.

[zelazrgn]

I added one of these addon messages as a workaround for #250

I don't like the solution for aura refresh as much, it's hooking into SMSG_SPELL_GO but only if it is an AuraSpells and it calls it for each hit target since I don't want to worry about max message length.

Does this seem like a potential performance issue?

[zelazrgn]

I'm looking into handling this the proper way using SMSG_SPELL_INTERRUPT_LOG

From testing on classic era, castbar addons don't detect players cancelling a cast, only when they are interrupted. Let me know if this is wrong.