Little something

[Artisan]

• Spreading dot's via Pestilence will have their damage reducet to half + added visual spreading effect.
• Contagion ( Unholy DK )
• Strength of Soul ( will only proc from Heal, Greater Heal or Flash Heal )
• Improved Lightning Shield ( 4P PvP set bonus for Elemental shaman )
• Holy Word Serenity ( renew part )
  
  + correct typo in 2P retribution paladin set bonus.
  + final little changes in SInestra's encounter.

Please, report any bugs related to this.
After morning restart.