Upload: SQUARE Sidebars v1.6.1 in trunk

git-svn-id: https://plugins.svn.wordpress.org/square-sidebars/trunk@965234 b8457f37-d9ea-0310-8a92-e5e31aec5664
Delete: Readme.md file

git-svn-id: https://plugins.svn.wordpress.org/square-sidebars/trunk@965235 b8457f37-d9ea-0310-8a92-e5e31aec5664