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/crafting/CraftingCalculationFailure.java

@@ -27,7 +27,7 @@ public class CraftingCalculationFailure extends RuntimeException
 
 	private static final long serialVersionUID = 654603652836724823L;
 
-	final IAEItemStack missing;
+	private final IAEItemStack missing;
 
 	public CraftingCalculationFailure( final IAEItemStack what, final long howMany )
 	{