Making 1.5 to get listed

git-svn-id: https://plugins.svn.wordpress.org/freshdesk-support/trunk@969401 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixing the version to 1.5 in ext.php file

git-svn-id: https://plugins.svn.wordpress.org/freshdesk-support/trunk@969406 b8457f37-d9ea-0310-8a92-e5e31aec5664