Added MirrorImage spell

[Lanaya97]

[trancefied]

thanks for the release! any idea why I'm getting this error after casting the spell please?

Node is null, Object already Despawned
at Server.Models.MapObject.Despawn() in C:\xx\ServerLibrary\Models\MapObject.cs:line 1094
  at Server.Models.MonsterObject.Process() in C:\xx\ServerLibrary\Models\MonsterObject.cs:line 930
  at Server.Models.Monsters.MirrorImage.Process() in C:\xx\ServerLibrary\Models\Monsters\MirrorImage.cs:line 30
  at Server.Models.MapObject.StartProcess() in C:\xx\ServerLibrary\Models\MapObject.cs:line 142
  at Server.Envir.SEnvir.EnvirLoop() in C:\xx\ServerLibrary\Envir\SEnvir.cs:line 1098

[Suprcode]

This has been added manually.