#432 Injector improvements

- Separate FieldInjection from default fallback for no-Inject public no-args constructor classes
- Make CommandInitializer a normal, instantiable service
- Add various injections instead of fetching through command service

src/main/java/fr/xephi/authme/command/executable/logout/LogoutCommand.java

@@ -2,8 +2,10 @@ package fr.xephi.authme.command.executable.logout;
 
 import fr.xephi.authme.command.CommandService;
 import fr.xephi.authme.command.PlayerCommand;
+import fr.xephi.authme.process.Management;
 import org.bukkit.entity.Player;
 
+import javax.inject.Inject;
 import java.util.List;
 
 /**
@@ -11,8 +13,11 @@ import java.util.List;
  */
 public class LogoutCommand extends PlayerCommand {
 
+    @Inject
+    private Management management;
+
     @Override
     public void runCommand(Player player, List<String> arguments, CommandService commandService) {
-        commandService.getManagement().performLogout(player);
+        management.performLogout(player);
     }
 }