implement config re-loading

src/main/java/gg/malloc/defense/commands/ReloadCommand.java

@@ -0,0 +1,22 @@
+package gg.malloc.defense.commands;
+
+import gg.malloc.defense.Plugin;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+
+public class ReloadCommand implements CommandExecutor {
+  Plugin m_plugin;
+
+  public ReloadCommand(Plugin plugin) {
+    m_plugin = plugin;
+  }
+
+  @Override
+  public boolean onCommand(CommandSender sender, Command command, String s, String[] args) {
+    sender.sendMessage("Reloading arenas...");
+    m_plugin.reloadArenas();
+    return true;
+  }
+}