Merge pull request #403 from Annunaki/master

Edited function AcreditedTest() function...
Game server/skill system: cleaned up opcodes & fixed "Instantly magic". Resolves #352.
Game server: removed unnecessary const_cast<> use.
Game server: fixes a bug with the weapon delay check (inconsistency with what the client sent) which caused a few weapons to fail when using normally.
Game server: revised the 2h item check.
Game server: removed a forgotten to-do comment (long since implemented).
Game server: implemented BUFF_TYPE_IGNORE_WEAPON (not sure how accurate to official it is... it always seems to removes both weapons client-side, so went with the client there); refs #229, resolves #220.
Lua Script: 11610_charel.lua - Implemented:

Royal Knight Promotion/Test

Training Knight Promotion/Test