Release version 2.18.1

git-svn-id: https://plugins.svn.wordpress.org/testimonials-widget/trunk@859166 b8457f37-d9ea-0310-8a92-e5e31aec5664
Correct Aihrus version

git-svn-id: https://plugins.svn.wordpress.org/testimonials-widget/trunk@859175 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update FAQ entries

git-svn-id: https://plugins.svn.wordpress.org/testimonials-widget/trunk@859795 b8457f37-d9ea-0310-8a92-e5e31aec5664