Core/Vehicles

* Fixed vehicle orientation on transports
* Fixed exiting vehicles on moving transports
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
Core/Instances: Fix Instance binding

Fix players not being bound to instance if the group was disbanded before killing any boss.
Fixes #437
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb