Add support for Death's Torment, the buff from the Shadow Priest T31 4P bonus.

• Bar text showing the current count
• Border color changes and audio cues
• • When you have max (12) stacks
• • • Border Color + enabled toggle
• • • Audio Cue + enabled toggle
• • When you have X stacks
• • • Border Color + enabled toggle
• • • Audio Cue + enabled toggle
• • • X is configurable