Added. Tour of sucuri security (video)

git-svn-id: https://plugins.svn.wordpress.org/sucuri-scanner/trunk@879743 b8457f37-d9ea-0310-8a92-e5e31aec5664
Modified. Decreased the limit of entries in last-logins page

git-svn-id: https://plugins.svn.wordpress.org/sucuri-scanner/trunk@879744 b8457f37-d9ea-0310-8a92-e5e31aec5664