Adds sign tracking and refunds #3 #8

src/main/java/net/knarcraft/paidsigns/manager/EconomyManager.java

@@ -2,7 +2,6 @@ package net.knarcraft.paidsigns.manager;
 
 import net.milkbowl.vault.economy.Economy;
 import org.bukkit.OfflinePlayer;
-import org.bukkit.entity.Player;
 
 /**
  * A manager that performs all Economy tasks
@@ -55,7 +54,7 @@ public final class EconomyManager {
      * @param player <p>The player to withdraw money from</p>
      * @param cost   <p>The amount of money to withdraw</p>
      */
-    public static void withdraw(Player player, double cost) {
+    public static void withdraw(OfflinePlayer player, double cost) {
         economy.withdrawPlayer(player, cost);
     }