Change AntiBot from static to instance

- Convert static methods in AntiBot
- Create BukkitService for operations requiring calls to static methods on the Bukkit class

src/main/java/fr/xephi/authme/util/BukkitService.java

@@ -0,0 +1,52 @@
+package fr.xephi.authme.util;
+
+import fr.xephi.authme.AuthMe;
+import org.bukkit.Bukkit;
+
+/**
+ * Service for operations requiring server entities, such as for scheduling.
+ */
+public class BukkitService {
+
+    private final AuthMe authMe;
+
+    public BukkitService(AuthMe authMe) {
+        this.authMe = authMe;
+    }
+
+    /**
+     * Schedules a once off task to occur as soon as possible.
+     * <p>
+     * This task will be executed by the main server thread.
+     *
+     * @param task Task to be executed
+     * @return Task id number (-1 if scheduling failed)
+     */
+    public int scheduleSyncDelayedTask(Runnable task) {
+        return Bukkit.getScheduler().scheduleSyncDelayedTask(authMe, task);
+    }
+
+    /**
+     * Schedules a once off task to occur after a delay.
+     * <p>
+     * This task will be executed by the main server thread.
+     *
+     * @param task Task to be executed
+     * @param delay Delay in server ticks before executing task
+     * @return Task id number (-1 if scheduling failed)
+     */
+    public int scheduleSyncDelayedTask(Runnable task, long delay) {
+        return Bukkit.getScheduler().scheduleSyncDelayedTask(authMe, task, delay);
+    }
+
+    /**
+     * Broadcast a message to all players.
+     *
+     * @param message the message
+     * @return the number of players
+     */
+    public int broadcastMessage(String message) {
+        return Bukkit.broadcastMessage(message);
+    }
+
+}