Add account deletion with email notification

Select users to delete, then optionally opt to notify the user in an
email with a provided reason.

config.go

@@ -69,6 +69,9 @@ func (app *appContext) loadConfig() error {
 	app.config.Section("notifications").Key("created_html").SetValue(app.config.Section("notifications").Key("created_html").MustString(filepath.Join(app.local_path, "created.html")))
 	app.config.Section("notifications").Key("created_text").SetValue(app.config.Section("notifications").Key("created_text").MustString(filepath.Join(app.local_path, "created.txt")))
 
+	app.config.Section("deletion").Key("email_html").SetValue(app.config.Section("deletion").Key("email_html").MustString(filepath.Join(app.local_path, "deleted.html")))
+	app.config.Section("deletion").Key("email_text").SetValue(app.config.Section("deletion").Key("email_text").MustString(filepath.Join(app.local_path, "deleted.txt")))
+
 	app.email = NewEmailer(app)
 
 	return nil