SimpleClaimSystem

+ Add placeholder

• Add placeholder "%claim-name%" for messages "remove-member-success" and "add-member-success" in the language file
• Add placeholder "%owner%" for message "access-claim-not-owner-lore" to display the owner in the 2nd filter of /claim list

+ Modify /claim command

• For the commands : ban, unban, owner, add, remove, you are no longer required to put the name of the claim if you are in it
• Then now, the tab completion will contains the name of your claims and the players

+ Remove heads cache for guis