Add SolidOpinion plugin

git-svn-id: https://plugins.svn.wordpress.org/solidopinion-comments/trunk@979993 b8457f37-d9ea-0310-8a92-e5e31aec5664
Changes in readme.txt

git-svn-id: https://plugins.svn.wordpress.org/solidopinion-comments/trunk@980091 b8457f37-d9ea-0310-8a92-e5e31aec5664