Fixed Bug.
- Issue on packetver 20131223 or newer where skill-damage with type 6 would be considered by the client as endure-type, fixing by swapping with value 8 which presents no different graphical representation than it'd otherwise. (Hercules 1c1e10a)

- Implemented official party-leader-changed-packet (Hercules 14475dc)
- Add Older Packet ShowScript & Implemented to montransform status change parameter optional
- Add support for packet ZC_SKILL_POSTDELAY_LIST. (idAthena)