Adding The banner-772x250.jpg and The banner-1544x500.jpg for the plugin page...

And adding the nova-dashboard-cleanup.php for the plugin php
and adding the readme.txt for the plugin page

git-svn-id: https://plugins.svn.wordpress.org/nova-dashboard-cleanup/trunk@776203 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme.txt Had error in the content

git-svn-id: https://plugins.svn.wordpress.org/nova-dashboard-cleanup/trunk@776204 b8457f37-d9ea-0310-8a92-e5e31aec5664