Quick fix for function name typo on the add_admin_notices hook
Stubbing Settings page

Settings are currently stored in a json file. This is annoying for two reasons:
The file is world readable (whoops), Site admins cannot change settings from WP
Added the rest of the Settings page

Added the rest of the Settings page that will be taking the place of the json file.
The json file currently no longer loads. There is still some residual cleanup to do
before this is final
Moved some defaults out of the json config file and into the class
Removing the no longer needed Settings.json file