version 1.7: updated readme.txt
version 1.7: updated readme.txt

git-svn-id: 0935c1fdbad5f96068b6f7b670e76317460ab7e3@631757 b8457f37-d9ea-0310-8a92-e5e31aec5664

wp-plugins/oik-nivo-slider,wp-plugins/oik-nivo-slider