Relative img url to assets branch banner

git-svn-id: https://plugins.svn.wordpress.org/copify/trunk@905734 b8457f37-d9ea-0310-8a92-e5e31aec5664
Works?

git-svn-id: https://plugins.svn.wordpress.org/copify/trunk@905735 b8457f37-d9ea-0310-8a92-e5e31aec5664
absolute url

git-svn-id: https://plugins.svn.wordpress.org/copify/trunk@905736 b8457f37-d9ea-0310-8a92-e5e31aec5664
Meh.

git-svn-id: https://plugins.svn.wordpress.org/copify/trunk@905737 b8457f37-d9ea-0310-8a92-e5e31aec5664
Check version requires a token

git-svn-id: https://plugins.svn.wordpress.org/copify/trunk@905738 b8457f37-d9ea-0310-8a92-e5e31aec5664