Finished adding fractionalDigits()

all of the fractionalDigits() have now been tested personally :)

src/net/milkbowl/vault/economy/plugins/Economy_AEco.java

@@ -230,4 +230,9 @@ public class Economy_AEco implements Economy {
         }
         return false;
     }
+
+	@Override
+	public int fractionalDigits() {
+		return 0;
+	}
 }

src/net/milkbowl/vault/economy/plugins/Economy_Craftconomy.java

@@ -302,6 +302,6 @@ public class Economy_Craftconomy implements Economy {
 
 	@Override
 	public int fractionalDigits() {
-		return 2;
+		return -1;
 	}
 }

src/net/milkbowl/vault/economy/plugins/Economy_CurrencyCore.java

@@ -263,4 +263,9 @@ public class Economy_CurrencyCore implements Economy {
         this.currency.getAccountManager().createAccount(playerName);
         return true;
     }
+
+	@Override
+	public int fractionalDigits() {
+		return -1;
+	}
 }

src/net/milkbowl/vault/economy/plugins/Economy_EconXP.java

@@ -237,4 +237,9 @@ public class Economy_EconXP implements Economy {
     public boolean createPlayerAccount(String playerName) {
         return false;
     }
+
+	@Override
+	public int fractionalDigits() {
+		return 0;
+	}
 }

src/net/milkbowl/vault/economy/plugins/Economy_McMoney.java

@@ -209,4 +209,9 @@ public class Economy_McMoney implements Economy {
         }
         return false;
     }
+
+	@Override
+	public int fractionalDigits() {
+		return -1;
+	}
 }

src/net/milkbowl/vault/economy/plugins/Economy_MineConomy.java

@@ -233,4 +233,9 @@ public class Economy_MineConomy implements Economy {
             return false;
         }
     }
+
+	@Override
+	public int fractionalDigits() {
+		return 2;
+	}
 }

src/net/milkbowl/vault/economy/plugins/Economy_eWallet.java

@@ -215,4 +215,9 @@ public class Economy_eWallet implements Economy {
         econ.createAccount(playerName, 0);
         return true;
     }
+
+	@Override
+	public int fractionalDigits() {
+		return 0;
+	}
 }