5.4 PTR Updates

- Ruthlessness added.
- Haste no longer inflates the value of a max energy bar (Combat).
- Fixed PvP bonus energy argument.
- Fixed Vendetta 4pc calc.
- Hipster AR glyph has decided it's too cool for glyph slots.
- ss_per_finisher marked to be updated.
- Updated ability info for SS, Evisc, Hemo, Backstab.
- Killing Spree managed to get lost. Reward: Pat yourself on the back.

- Something something something Sub modeling!