Core/Spells: Define and implement CAST_FLAG_NO_GCD
Core/Vehicles: Define and implement VEHICLE_SEAT_FLAG_B_KEEP_PET
Core/Spells: Skip adding CAST_FLAG_RUNE_LIST to rune spells if it's a triggered cast. Solves some of the occasional Death Knight rune visual issues
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore

Conflicts:
	src/server/game/Miscellaneous/Language.h
	src/server/scripts/Northrend/Ulduar/Ulduar/instance_ulduar.cpp
	src/server/scripts/Northrend/Ulduar/Ulduar/ulduar_teleporter.cpp
Fix build.
Scripts/Gurtogg:
* fixed bloodboil targeting
* fel rage should only hit players

Closes #12193
Core/Creature: load correct vehicleid of difficulty mode npcs if set otherwise inherit from normal mode entry

Closes #8783
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore
Merge branch 'master' of https://github.com/TrueWoW/TrinityCore

Conflicts fixed:
	src/server/scripts/Northrend/Ulduar/Ulduar/instance_ulduar.cpp