SQL: Completed the entire set bonuses to work with all masterwork items for all sets from A-s80 (including pvp sets). Removed invalid set bonuses for shields from s80 dynasty heavy sets, thanks JeC.

- On Gracia Final, all skill enchants cost 10x less xp (so xp and sp value is the same)
- Changing success rate to be more retail like. No changes to 76 and 77. 78 and 79 now have same chances, 80+ have all same chances too as no more info from retail is known (only 80 lvl chances). Chances are lower now, but better be safe than sorry. When more info is known, it can be adjusted again to match retail.
- All skills have now the same success rate.

- Various stack order fixes mainly buffs and scrolls that last 60minutes
- 4th sp scroll ID added (SQL support too)
- Skill: Purification Field
- Skill: Song of Purification (need core support for remove debuff effect)
- Elemental Attack Stones ( item ID 7906 - 7911 ) (SQL support too)

Note: Some (well, many) guards have no info about drop yet. So they got 1-3 epps drop. Why? Every type of guard on fort drops it, and 1-3 is safe low (usually you get 2-5 or more). Also players notice that nothing dropped, but usually they dont notice that they got a bit less than they should get. It can be updated later when more info is avaiable.

D and C commons drop no more, only superior items.
For B and A grade, in certain locations superior items and in rest of locations still common items drop.
More changes later.

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