Add CSS minification, AJAX settings, and modern admin styling

admin/js/wpa-superstar-admin.js

@@ -0,0 +1,14 @@
+jQuery(document).ready(function($) {
+    $('.wpa-superstar-toggle input').on('change', function() {
+        var option = $(this).attr('name');
+        var value = $(this).is(':checked') ? 1 : 0;
+        $.post(ajaxurl, {
+            action: 'wpa_superstar_update_option',
+            option: option,
+            value: value,
+            nonce: '<?php echo wp_create_nonce( "wpa-superstar-nonce" ); ?>'
+        }, function(response) {
+            console.log(response);
+        });
+    });
+});