Core/Vehicles: Fixed a crash that happened if someone called ExitVehicle during seat changing
Core/Movement: Do not attempt to pathfind for stop/turn movement
Core/Summons: Implement summon groups system to be able to summon multiple NPCs at once without need of hardcoding the positions. Almost all hardcoded positions can now be moved to DB.

Thx to @Shauren for his help.
Merge pull request #9280 from horn/summons

Core/Summons: Implement summon groups system to be able to summon multiple NPCs at once without need of hardcoding the positions. Almost all hardcoded positions can now be moved to DB.
Core: Fix a comment in LoadConfigSettings

Closes #9292
Script/Quest: The Lonesome Watcher (12877)

Closes: #9185
See: http://www.youtube.com/watch?v=ylZRMu9CIMw
Merge https://github.com/TrinityCore/TrinityCore into mmaps