small code improvement when updating plugin from other versions : creates yofla360 folder with settings.ini

git-svn-id: https://plugins.svn.wordpress.org/360-product-rotation/trunk@973596 b8457f37-d9ea-0310-8a92-e5e31aec5664
tagging version 1.0.9

git-svn-id: https://plugins.svn.wordpress.org/360-product-rotation/trunk@973598 b8457f37-d9ea-0310-8a92-e5e31aec5664