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/block/AEBaseTileBlock.java

@@ -98,7 +98,7 @@ public abstract class AEBaseTileBlock extends AEBaseBlock implements IAEFeature,
 		ReflectionHelper.setPrivateValue( Block.class, this, b, "isTileProvider" );
 	}
 
-	public boolean hasBlockTileEntity()
+	private boolean hasBlockTileEntity()
 	{
 		return this.tileEntityType != null;
 	}