Updated changelog


git-svn-id: https://plugins.svn.wordpress.org/polldaddy/trunk@1033138 b8457f37-d9ea-0310-8a92-e5e31aec5664
Bump version to 2.0.26


git-svn-id: https://plugins.svn.wordpress.org/polldaddy/trunk@1033141 b8457f37-d9ea-0310-8a92-e5e31aec5664