multisite install improvements

git-svn-id: https://plugins.svn.wordpress.org/events-made-easy/trunk@1014401 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix undefined var

git-svn-id: https://plugins.svn.wordpress.org/events-made-easy/trunk@1014402 b8457f37-d9ea-0310-8a92-e5e31aec5664
try to use admin info when no other contact info is present for an event

git-svn-id: https://plugins.svn.wordpress.org/events-made-easy/trunk@1014403 b8457f37-d9ea-0310-8a92-e5e31aec5664