first 1.11.1 attempt

src/main/java/com/sosnitzka/taiga/TAIGAGuiFactory.java

@@ -11,6 +11,7 @@ import net.minecraftforge.fml.client.config.GuiConfig;
 import net.minecraftforge.fml.client.config.GuiConfigEntries;
 import net.minecraftforge.fml.client.config.IConfigElement;
 
+import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
@@ -20,6 +21,16 @@ public class TAIGAGuiFactory implements IModGuiFactory {
     public void initialize(Minecraft minecraftInstance) {
     }
 
+    @Override
+    public boolean hasConfigGui() {
+        return true;
+    }
+
+    @Override
+    public GuiScreen createConfigGui(GuiScreen parentScreen) {
+        return new TAIGAConfigGui(parentScreen);
+    }
+
     @Override
     public Class<? extends GuiScreen> mainConfigGuiClass() {
         return TAIGAConfigGui.class;
@@ -30,6 +41,7 @@ public class TAIGAGuiFactory implements IModGuiFactory {
         return null;
     }
 
+    @Nullable
     @Override
     public RuntimeOptionGuiHandler getHandlerFor(RuntimeOptionCategoryElement element) {
         return null;