removed explicit HTTP indication

git-svn-id: https://plugins.svn.wordpress.org/taboola/trunk@1015924 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme.txt

git-svn-id: https://plugins.svn.wordpress.org/taboola/trunk@1015927 b8457f37-d9ea-0310-8a92-e5e31aec5664