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/parts/BusCollisionHelper.java

@@ -31,7 +31,7 @@ import appeng.api.util.AEPartLocation;
 public class BusCollisionHelper implements IPartCollisionHelper
 {
 
-	final List<AxisAlignedBB> boxes;
+	private final List<AxisAlignedBB> boxes;
 
 	private final EnumFacing x;
 	private final EnumFacing y;