Moving screenshots.

git-svn-id: https://plugins.svn.wordpress.org/compatible-post-sharing-system/trunk@852980 b8457f37-d9ea-0310-8a92-e5e31aec5664
Deleting assets directory.

git-svn-id: https://plugins.svn.wordpress.org/compatible-post-sharing-system/trunk@852981 b8457f37-d9ea-0310-8a92-e5e31aec5664