update to 1.1.2

git-svn-id: https://plugins.svn.wordpress.org/slidewizard/trunk@892769 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme

git-svn-id: https://plugins.svn.wordpress.org/slidewizard/trunk@892770 b8457f37-d9ea-0310-8a92-e5e31aec5664