Add economy support. Update to 2.1.1

Not tested at all!

lang.yml

@@ -1,6 +1,7 @@
 # Use & for color codes.
 # %p is where the player name will get inserted.
 # %v is where the vault number will get inserted.
+# %price is the price.
 # Made with love :)
 title-name: "&4[&fPlayerVaults&4]: "
 open-vault: "&fOpening vault &a%v"
@@ -11,4 +12,8 @@ player-only: "Sorry but that can only be run by a player!"
 must-be-number: "&cYou need to specify a number between 1-99"
 invalid-args: "&cInvalid args!"
 delete-vault-error: "&cError deleting vault :("
-no-permissions: "&cYou don't have permission for that!"
+no-permissions: "&cYou don't have permission for that!"
+insufficient-funds: "&cYou don't have enough money for that!"
+refund-amount: "&fYou were refunded &a%price &ffor deleting that vault."
+cost-to-create: "&fYou were charged &c%price &ffor creating that vault."
+cost-to-open: "&fYou were charged &c%price &ffor opening that vault."