Update readme.txt for new plugin version (1.0.5).

git-svn-id: https://plugins.svn.wordpress.org/square-sidebars/trunk@962078 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update readme.txt for new plugin version (1.0.5).

git-svn-id: https://plugins.svn.wordpress.org/square-sidebars/trunk@962079 b8457f37-d9ea-0310-8a92-e5e31aec5664