Implement channel watch opcode. Debug only.

Add learn voters command. Teaches all UW voter spells.
Enhance and fix dupe patches.
Change permissions and other things on LOGOUT_REQUEST, PLAYER_LOGOUT and
LOGOUT_CANCEL opcodes.
Added debug like to TELEPORT_ACK opcode.
Normalise EXP values for levels above 70.
Implement dodge algorithm from MangosOne with a few changes.
Disable default ArcEMU dodge tables.
Send item use error when using equippable items from the bag. WPE
exploit and custom item issue.