Core&DB/Spells: Move custom spell attributes from code to DB, `spell_custom_attr` table

`spell_custom_attr`
- `entry` uint PK
- `attributes` uint (enum SpellCustomAttributes of SpellInfo.h)
SQL: Update old .sql files to keep consistency with auth_database.sql

Also update characters_database.sql (generated by mysqldump)
Core/Spells: Fix DK Ghoul's damage after ad8eb434c02e451effd0949aaa7d2b7999d91597. I misread 'SpellScript::m_damage' for 'SpellScript::damage'.

By @joschiwald
SQL: Fixed two issues with 2014_01_31_00_world_spell_custom_attr.sql

Engine should be MyISAM and not MRG_MyISAM
MySQL doesn't play nice with hex values so converted them to decimal

Closes #11537
Core/Achievs: Rename a few unknown achievement criteria flags

Source tomrus88, Mangos
DB/item_template: Set defaults of spellcharges_X to 0 instead of NULL

Closes #10748

Signed-off-by: Duarte Duarte <dnpd.dd@gmail.com>
SQL: Update 2014_01_31_01_world_item_template.sql
Core/Arena: Fix arena season not always appearing to clients

Arena season sent to client with SMSG_INIT_WORLD_STATES opcode was not sent if Player was on a zone with id 0 on login. Initializing the zone id to -1 will always trigger UpdateZone() properly on login.
Fixes #10623
Shared/Logs: Fix crash in Console log output

Correctly handle the return value of vsnprintf() which returns -1 if the buffer is too small http://msdn.microsoft.com/en-us/library/1kt27hek.aspx . In this case just truncate the output.
This caused a crash on character delete if Logger.entities.player.dump was enabled and set to 3.
Fixes #11539
Build: Use override/final keywords for VS 2012 and newer. (VS 2013 still defines __cplusplus as 199711L)
Core/Chat: Fix an exploit where it was possible to speak in universal language in say/yell/emote by sending CMSG_MESSAGECHAT using cheats.
DB/Creature: Fix warnings with creature_formations loading
Core/Scripts: Fix quest The Totem of Kar'dash alliance version.

Remove some hungarian notation for horde side version.

Closes #11035
Core/Spells: fix crash when loading custom spell attr with invalid spellid
Core/Spell: Handle SPELL_AURA_FORCE_REACTION missing cases

Always check forced reputation ranks before any other faction check to get the reaction between 2 units.
Fixes #5790
Core/Chat: Fix a new issue caused by c0224dd7ca9a39034518bd7e6285702636749929 which would trigger false positives for CHAT_MSG_AFK and CHAT_MSG_DND.
Core/Misc: remove error log, which returns false positives
Merge branch 'master' of https://github.com/natepizzle/TrinityCore