Removed curency formatting and moved symbol into language file

This causes large numbers to be longer being formatted/pretty printed but allows people to use their own currency

src/main/java/com/songoda/epicheads/head/Head.java

@@ -103,7 +103,7 @@ public class Head {
         if (!free) {
             String fcost = Settings.ECONOMY_PLUGIN.getString().equalsIgnoreCase("item")
                     ? cost + " " + Settings.ITEM_TOKEN_TYPE.getString()
-                    : EconomyManager.formatEconomy(cost);
+                    : /* EconomyManager.formatEconomy(cost) */ String.valueOf(cost);  // FIXME: EconomyManager#formatEconomy etc only work in some languages (. vs ,) and only for the currency symbol $
             lore.add(plugin.getLocale().getMessage("general.head.cost")
                     .processPlaceholder("cost", fcost).getMessage());
         }

src/main/resources/en_US.lang

@@ -20,7 +20,7 @@ general:
   head:
     staffpicked: '&8Staff Favorite'
     id: '&8ID: &7%id%'
-    cost: '&8Cost: &7%cost%'
+    cost: '&8Cost: &7$%cost%'
 gui:
   heads:
     refine: '&9Refine Search'