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/IntegrationSide.java

@@ -19,7 +19,7 @@
 package appeng.integration;
 
 
-public enum IntegrationSide
+enum IntegrationSide
 {
 	CLIENT, SERVER, BOTH
 }