Core/Transports

* Rewritten path generation, now uses splines - timers are a lot more accurate now
* Implemented stopping transports
* Implemented spawning transports in instances
* Implemented spawning gameobjects as transport passengers
* Transport passengers are now stored in creature/gameobject table using gameobject_template.data6 from transport's template as map id
Build fix
Build fix
Build fix
Fixed sql files for ce55647c415b710c6b440d96c2f26ebbc06c1d6e