add img

git-svn-id: https://plugins.svn.wordpress.org/wp-thumbnail-slider/trunk@951036 b8457f37-d9ea-0310-8a92-e5e31aec5664
add missing style

git-svn-id: https://plugins.svn.wordpress.org/wp-thumbnail-slider/trunk@951037 b8457f37-d9ea-0310-8a92-e5e31aec5664