Core/Scripting: Add Wrathbone Flayer script to show channelling visual and correct combat AI.
Core/Movement: Do not remove movement flags that have special opcodes associated with them on teleport

Closes #10162
Script/Commands: Fix a crash in .arena captain command
DB/Errors: Fix a db startup error
Core/Players: Dueling players in your party / raid should not make them always detectable.

Fixes seeing stealthed rogues & druids, as well as invisible mages in duels.
DB/Items: Change item_template.Flags to uint32 (int(10) unsigned)
SQL: Prevent a warning in 2013_07_14_01_world_item_template.sql
Merge remote-tracking branch 'official/master'