Use plugin logger instead of Minecraft logger in README example

The JavaPlugin class provides plugins with their own logger via getLogger() which is the preferred means of logging content to the console as it prepends the plugin's name. Using a Logger with the Minecraft prefix is non-descript and poor practice because it will not properly source from where the log message is coming. Beginners should not be given this poor practice as an example.

README.md

@@ -67,8 +67,6 @@ Implementing Vault is quite simple. It requires getting the Economy, Permission,
 ```java
 package com.example.plugin;
 
-import java.util.logging.Logger;
-
 import net.milkbowl.vault.chat.Chat;
 import net.milkbowl.vault.economy.Economy;
 import net.milkbowl.vault.economy.EconomyResponse;
@@ -82,20 +80,19 @@ import org.bukkit.plugin.java.JavaPlugin;
 
 public class ExamplePlugin extends JavaPlugin {
 
-    private static final Logger log = Logger.getLogger("Minecraft");
     private static Economy econ = null;
     private static Permission perms = null;
     private static Chat chat = null;
 
     @Override
     public void onDisable() {
-        log.info(String.format("[%s] Disabled Version %s", getDescription().getName(), getDescription().getVersion()));
+        getLogger().info(String.format("[%s] Disabled Version %s", getDescription().getName(), getDescription().getVersion()));
     }
 
     @Override
     public void onEnable() {
         if (!setupEconomy() ) {
-            log.severe(String.format("[%s] - Disabled due to no Vault dependency found!", getDescription().getName()));
+            getLogger().severe(String.format("[%s] - Disabled due to no Vault dependency found!", getDescription().getName()));
             getServer().getPluginManager().disablePlugin(this);
             return;
         }
@@ -129,7 +126,7 @@ public class ExamplePlugin extends JavaPlugin {
 
     public boolean onCommand(CommandSender sender, Command command, String commandLabel, String[] args) {
         if(!(sender instanceof Player)) {
-            log.info("Only players are supported for this Example Plugin, but you should not do this!!!");
+            getLogger().info("Only players are supported for this Example Plugin, but you should not do this!!!");
             return true;
         }