DB/Quest: Seek the Farstriders

By MrSmite, closes #11244
DB/Creature: Delete incorrectly spawned Gharsul the Remorseless

Closes #11242
DB/Creature: Fix Shaman Elementals

By Vincent-Michael, closes #11261
DB/Quest: Treats for Great-father Winter

By dr-j, closes #11320
DB/Conditions: Requiere DK to use Scourge Gryphon

By dr-j, closes #11133
SQL: Rename in correct name
Merge pull request #3 from TrinityCore/master

pull