InstanceString

== Format ==
Instance lock strings consist of the string "instancelock:" followed by 4 colon delimited portions, which describe the player, its status of completion and the instance whose status of completion is related to.
 instancelock:playerGUID:instanceID:difficultyID:encounterProgress
; playerGUID : String - The GUID of the player who created the link.
; instanceID : Number - The InstanceID of the instance.
; difficultyID: Number - The DifficultyID of the instance.
; encounterProgress : Number - Bitset representing which encounters the player is locked to.