C: corrected log message

git-svn-id: https://plugins.svn.wordpress.org/the-word-widget/trunk@972443 b8457f37-d9ea-0310-8a92-e5e31aec5664
M: tested up to 4.0-beta4

git-svn-id: https://plugins.svn.wordpress.org/the-word-widget/trunk@972444 b8457f37-d9ea-0310-8a92-e5e31aec5664
C: readme - removed duplicate and wrong WordPress entry under "System Requirements", updated tested PHP version to 5.5.9

git-svn-id: https://plugins.svn.wordpress.org/the-word-widget/trunk@972476 b8457f37-d9ea-0310-8a92-e5e31aec5664