Reduces visibility of internal fields/methods

Reduces the visibility of all fields to private and create setters/getters
when necessary. Exceptions are fields with GuiSync as these need to be
public.

Reduces the visibility of internal methods to private/protected/default when possible.

src/main/java/appeng/tile/networking/TileCreativeEnergyCell.java

@@ -33,7 +33,7 @@ public class TileCreativeEnergyCell extends AENetworkTile implements IAEPowerSto
 
 	public TileCreativeEnergyCell()
 	{
-		this.gridProxy.setIdlePowerUsage( 0 );
+		this.getProxy().setIdlePowerUsage( 0 );
 	}
 
 	@Override