Buildsystem/GCC: Enforce version 4.7.2 and enable c++11 compilation
Core/Misc: Removed unused defines, added missing include and removed a few warnings
Scripts/Icecrown Citadel

* Deathbringer Saurfang will now evade if any player stands on the gunship
* Fixed players being stuck in combat after defeating gunship
* Fixed players not sticking to gunships
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore