Force cluster-rebuilds on the first detected change, if their bounds do not match.

Also use a client-side method to update connected textures
for crafting cubes if two previously distinct clusters are connected.
Refactored MBCalculator to use generics for type checks and remove more casts.

src/main/java/appeng/me/cluster/IAEMultiBlock.java

@@ -18,11 +18,11 @@
 
 package appeng.me.cluster;
 
-public interface IAEMultiBlock {
+public interface IAEMultiBlock<Cluster extends IAECluster> {
 
     void disconnect(boolean b);
 
-    IAECluster getCluster();
+    Cluster getCluster();
 
     boolean isValid();
 }