* Mostly aimed at removing Log/DatabaseEnv includes from other headers
* Fix most packet headers including other packet headers - moved common structures such as ItemInstance to their own files
* Moved SAI function definitions to source files (massive or requiring many different dependencies)
- There's still an overload allowing for x, y, z, o to be passed directly
- Fixed default animstate for GameObject creation in many places, it should be 255, not 100 (checked in sniffs)
(cherry picked from commit 62bfee37cb21584cef631dda428feaf5eb829cda)
# Conflicts:
# src/server/game/Battlefield/Battlefield.cpp
# src/server/game/Battlegrounds/Battleground.cpp
# src/server/game/Entities/GameObject/GameObject.cpp
# src/server/game/Entities/GameObject/GameObject.h
# src/server/game/Entities/Object/Object.cpp
# src/server/game/Entities/Object/Object.h
# src/server/game/Spells/SpellEffects.cpp
# src/server/scripts/Commands/cs_gobject.cpp
# src/server/scripts/EasternKingdoms/SunkenTemple/instance_sunken_temple.cpp
# src/server/scripts/EasternKingdoms/ZulAman/zulaman.cpp
# src/server/scripts/Kalimdor/zone_feralas.cpp
# src/server/scripts/Northrend/Nexus/EyeOfEternity/boss_malygos.cpp
# src/server/scripts/Northrend/Nexus/EyeOfEternity/instance_eye_of_eternity.cpp
# src/server/scripts/OutdoorPvP/OutdoorPvPSI.cpp
* Updated segment distance calculations - now selected path fully matches clientside preview
* Fixed building sOldContinentsNodesMask to also include any new taxi node added in future
* Implemented filtering possible hops when searching for shortest path by faction (and in future PlayerCondition)
* Changed ObjectMgr::GetNearestTaxiNode to filter faction nodes by flags instead of mount display
* Added ObjectGuid traits to easily access whether guid type can be generated globally (ObjectMgr) or not
* This adds separate (per map) guid sequences depending on object type
* Ported map object container from cmangos/mangos-wotlk@a2d396eb0b
* Added type container visitor for TypeUnorderedMapContainer
* Implemented helper function to erase unique pairs from multimap containers
* Moved object storage of all objects except players and transports to map level
* Added containers linking database spawn id with creature/gameobject in world
* Renamed DBTableGuid to spawnId
* Added a separate spawn id sequence generator for creatures and gameobjects - this will be used in db tables
* Moved building SMSG_UPDATE_OBJECT - updatefields changes broadcast to map update
Shauren