Refactored AEConfig (#2633)

Added a singleton getter instead the public field.
Reduced all fields to private.
Replaced field access with getters.
Added setters where necessary (Dimension/Biome Registration)
Added config options to disable more features.
Splitted Enum name from the config key.
Changed FacadeConfig and Networkhandler similar to AEConfig.init().

src/main/java/appeng/hooks/TickHandler.java

@@ -201,7 +201,7 @@ public class TickHandler
 				final Collection<CraftingJob> jobSet = this.craftingJobs.get( wte.world );
 				if( !jobSet.isEmpty() )
 				{
-					final int simTime = Math.max( 1, AEConfig.instance.craftingCalculationTimePerTick / jobSet.size() );
+					final int simTime = Math.max( 1, AEConfig.instance().getCraftingCalculationTimePerTick() / jobSet.size() );
 					final Iterator<CraftingJob> i = jobSet.iterator();
 					while( i.hasNext() )
 					{