Update property.png icon

git-svn-id: https://plugins.svn.wordpress.org/wp-smart-property/trunk@935524 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove unwanted files

git-svn-id: https://plugins.svn.wordpress.org/wp-smart-property/trunk@935526 b8457f37-d9ea-0310-8a92-e5e31aec5664