DB/Quest: Hive'Zora Scout Report

By dr-j, closes #781
Core: Fix warnings vs2014 ctp (no support)
Scripts/Commands: Fix warnings vs2014 ctp (no support)
Core/Creature: Fix problems with neutral innkeepers
Core/Battlefield: move complex methods from BattlefieldWG.h to BattlefieldWG.cpp
Core/Battleground: moved some arena related code into a generic arena class
* fixed typo in random bg selection, that causes no bg is created if only one bg is enabled
* fixed swapped worldstates in Ring of Valor
DB/Creature: Script a lot of creatures

By dr-j, closes #12498
Core/Battleground: fixed typo
* and fixed some warnings
DB/Misc: Fix Frogger (Naxxramas)
Closes #12434
DB/Creature: Stinker

By dr-j, closes #12502
DB/SAI: Adition to 70c82a3

By dr-j
DB/Quest: Sarkoth

By dr-j, closes #12511
DB/Quest: Fix Banishing Portal

By dr-j, closes #12510
DB/Misc: Fix Gossip on Kor'kron overseer

By dr-j, closes #12514
DB/Misc: Adition to 9f0ec86

By dr-j
Buildsystem/GCC: Fixed release linking errors
Merge branch 'master' of github.com:TrinityCore/TrinityCore into boost
Update related files to lowered Boost version requirement