Cleaning Up Mod Integrations (#2581)

* Cleaned up unused Mod integrations other than for mods that are likely to be integrated soon.
* Introduced an easier Facade class to access mod integration abstractions (called Integrations).
* Removed the link between IntegrationType and integration abstraction. Integrations are now explicitly instantiated inside of IntegrationNode.

src/main/java/appeng/integration/abstraction/IC2PowerSink.java

@@ -0,0 +1,49 @@
+/*
+ * This file is part of Applied Energistics 2.
+ * Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved.
+ *
+ * Applied Energistics 2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Applied Energistics 2 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
+ */
+
+package appeng.integration.abstraction;
+
+
+import java.util.Set;
+
+import net.minecraft.util.EnumFacing;
+
+
+/**
+ * Provides an abstraction for the IC2 Basic Sink so it can be stubbed out easily when the integration is disabled, or
+ * if the IC2 API is not available.
+ */
+public interface IC2PowerSink
+{
+
+	default void invalidate()
+	{
+	}
+
+	default void onChunkUnload()
+	{
+	}
+
+	default void onLoad()
+	{
+	}
+
+	default void setValidFaces( Set<EnumFacing> faces )
+	{
+	}
+}