Protection, Placeholder and fix

Add :
- PlaceHolder %faction_name_at_location%
- Add protection with farm land
- Add protection to shulkers, to beacon, cauldron and brewing stand
- Add protection with bone meal
- Convert permission for the command

Fix :
- Console /f list
- Console /f show
- Claim with Wilderness is unclaim the land
- Dynmap players.admins and players.admins.count is for co-leader. The leader already have players.leader and a faction have one leader only

Optimization

src/main/java/com/massivecraft/factions/struct/Permission.java

@@ -22,6 +22,7 @@ public enum Permission {
     CLAIM_LINE("claim.line"),
     CLAIM_RADIUS("claim.radius"),
     CONFIG("config"),
+    CONVERT("convert"),
     CREATE("create"),
     DEFAULTRANK("defaultrank"),
     DEINVITE("deinvite"),