v1.0 (17 Mar 2020)

• Turn into proper Kiwi TCMS plugin and install settings overrides under
  tcms_settings_dir/ (compatible with Kiwi TCMS v8.2 or later):

  • does not need MENU_ITEMS and PUBLIC_VIEWS override anymore
  • does not need to load tcms_github_marketplace in INSTALLED_APPS
    manually

• Jump over tcms_tenants.views.NewTenantView b/c it requires
  tcms_tenants.add_tenant permission and here we don't need that

• Exclude public tenant from recurring purchase hooks

• Do not attempt delete for superuser cancelling their tenant purchases