Reload announcements when reloading the config-file.

The announcements file loading method is renamed to indicate that it's also meant for re-loading, and the access modifier is changed from private to package-private to allow ArenaMasterImpl to call it.

Closes #462

src/main/java/com/garbagemule/MobArena/ArenaMasterImpl.java

@@ -696,6 +696,7 @@ public class ArenaMasterImpl implements ArenaMaster
         config = plugin.getConfig();
         initialize();
         plugin.reloadSigns();
+        plugin.reloadAnnouncementsFile();
         if (wasEnabled) setEnabled(true);
     }
 

src/main/java/com/garbagemule/MobArena/MobArena.java

@@ -82,7 +82,7 @@ public class MobArena extends JavaPlugin
         saveConfig();
 
         // Initialize announcements-file
-        loadAnnouncementsFile();
+        reloadAnnouncementsFile();
 
         // Load boss abilities
         loadAbilities();
@@ -201,7 +201,7 @@ public class MobArena extends JavaPlugin
         }
     }
 
-    private void loadAnnouncementsFile() {
+    void reloadAnnouncementsFile() {
         // Create if missing
         File file = new File(getDataFolder(), "announcements.yml");
         try {