Made minor changes to readme and index.php - updated plugin URL

git-svn-id: http://plugins.svn.wordpress.org/powerpress-posts-from-mysql/tags/0.9.75@734898 b8457f37-d9ea-0310-8a92-e5e31aec5664
added new text file
Merge branch 'rework-v-9.75' of github.com:machouinard/powerpress-posts-from-mysql into rework-v-9.75