Better naming of the multisite class and function
Don't forget to require some files
Correct missing  where using  as the referenced class
Fix hooked method names in multisite admin
Change usage of Multisite wording to Network
Rename multisite.php to network.php in line with 34ee03c
Move network functionality initialization to separate method of the main class
Fix leftover from the singleton template
Rename some internal network methods
Fix incorrect array definition in plugin settings
Use the plugin basename when checking for plugin activation
Provide head and footer hooks for the network settings page
Fix call to 'guard_network_settings()' in Guard_Network::network_settings_api()
Delay running Guard_Network::network_only() on plugins_loaded hook
Rename and reorder the network settings hooks/methods
Organize logic in 'Guard_Network::network_only()'
Shorten logic in 'Guard::login_message()'
Update inline comments