move admin_url to method

hopefully will make it easier to debug proper admin_url v network_admin_url v home_url (for domain mapping)
need to add wp-admin
Merge pull request #100 from afragen/fix-domain-mapping

move admin_url to method
move admin_url to method

hopefully will make it easier to debug proper admin_url v network_admin_url v home_url (for domain mapping)
need to add wp-admin
Merge branch 'develop' of github.com:bmarshall511/wordpress-zero-spam into develop
#101. Fixed issue with Gravity Forms not validating correctly.