Script for Prince Liam Greymane NPC and Rampaging Worgen creature

Scripted Prince Liam Greymane in phase 1
Scripted Prince Liam Greymane in phase 2
Scripted Rampaging Worgen Enrage spell
Added SQL text for Prince Liam Greymane emote

To have this script working you need also to pull database repo to get patch for Database.