update readme.txt

git-svn-id: https://plugins.svn.wordpress.org/adblock-notify-by-bweb/trunk@1019315 b8457f37-d9ea-0310-8a92-e5e31aec5664
remove readme.md

git-svn-id: https://plugins.svn.wordpress.org/adblock-notify-by-bweb/trunk@1019316 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme.md

git-svn-id: https://plugins.svn.wordpress.org/adblock-notify-by-bweb/trunk@1019317 b8457f37-d9ea-0310-8a92-e5e31aec5664