Update random content plugin to 1.0 version

git-svn-id: https://plugins.svn.wordpress.org/random-content/trunk@1019194 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add classes for random content plugin

git-svn-id: https://plugins.svn.wordpress.org/random-content/trunk@1019195 b8457f37-d9ea-0310-8a92-e5e31aec5664