DB/Quest: A Tangled Skein

By Trista, closes #6584
Create 2014_06_25_04_world_misc.sql

By dr-j, closes #4399
DB/Quest: Redemption

By dr-j, closes #11233
DB/Conditions: Healing the Lake/Neutralizing Agent

By MitchesD, closes #3337
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
SQL: Sync auth_database
DB/Conditions: Fix conditions for spell "Symbol of Life"
SQL: Renamed updates to follow naming convention
Core/Skills: Check if a skill can be unlearned with SkillRaceClassInfo.dbc data and use max skill level from SkillTiers.dbc
Tools/MMapsGenerator: Improve mmaps generation time on multi-core CPUs

Queue biggest maps first for mmaps generation to avoid waiting for last map, usually map id 571.
Fix wrong maps count being printed on startup.
Core/MMAPs: Update recast

Update recast to https://github.com/memononen/recastnavigation/commit/42b96b7306d39bb7680ddb0f89d480a8296c83ff
Previous MMAPs might still work but it's recommended to re-extract them.
Revert "[TW330] - Core/Spells: Adds back Reaper4vp's stuff"

This reverts commit 94b1bc1db551c17a5aafe8ec620c6fa4a2813fb2.
DB/Quest: Redemption

Fix missing delete.
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
Merge branch 'master' of https://github.com/TrueWoW/TrinityCore into ghbb
Core/Items: Items shouldn't have a negative item level

Closes #11631
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into Transmogrification

Conflicts:
	src/server/scripts/Custom/CMakeLists.txt
Merge branch 'Transmogrification' of https://github.com/shenhuyong/TrinityCore into ghbb

Conflicts:
	src/server/scripts/Custom/CMakeLists.txt