Admin UI; Make the links show only on hover, and make Delete be red


git-svn-id: https://plugins.svn.wordpress.org/keyring/trunk@898909 b8457f37-d9ea-0310-8a92-e5e31aec5664
Readme: Clean up the details for 1.6 a bit, and add a couple more things that changed.


git-svn-id: https://plugins.svn.wordpress.org/keyring/trunk@898910 b8457f37-d9ea-0310-8a92-e5e31aec5664