5.7.1 version

git-svn-id: https://plugins.svn.wordpress.org/social-polls-by-opinionstage/trunk@803654 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed version number

git-svn-id: https://plugins.svn.wordpress.org/social-polls-by-opinionstage/trunk@803898 b8457f37-d9ea-0310-8a92-e5e31aec5664