Core/Loot: Fix master loot

Players will be able to open the loot window and see the items in case of master loot.
If the item is under threshold FFA applies, else the item becomes locked.

Also fix an exploit related to master loot item give.
Core/Loot: Implement round robin for under threshold items in case of master loot

Thanks @Shauren for pointing out
Fixed build without PCH
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
DB/SAI: Fix Shadowsworn Cultist

By dr-j, closes #11767
DB/Quest: Fixes Gino's visibility and quest chain

By nelegalno and Rushor, closes #9030
DB/Misc: Set comment of creature_classlevelstats to text

By Magnifikator closes #11762
Core/Logging: Fixed filenames of backup logs

Closes #11765
Update README.md
DB/Quest: Fix wrong ExclusiveGroup

By untaught, Closes #11715
DB/SAI: Fix Dun Garok Rifleman spam

By dr-j, closes #11773
DB/SAI: Umpi

By dr-j, closes #11775
DB/SAI: Elemental Slave

By untaught, updates #11742
DB/SAI: Ferocious Yeti spamming Berserk

By dr-j closes #11776
Update readme for cmake version for c++11 stuff
DB/Misc: Miscellaneous fixes

By dr-j, closes #11780
Fix wrong loot in two chests for quest 'The Shadow Tomb'.
Fix turning in of 13120 Deaths Gaze.
Fix torching sunfury hold.
Cmake: Added level restriction for msvc 2013
Update 2014_03_24_02_world_creature_classlevelstats.sql