fix(autocomplete): tests and add documentation

Author: wuda-io

docs/css/ghpages-materialize.css

@@ -182,7 +182,21 @@
     $('.sidenav').sidenav();
     $('.tap-target').tapTarget();
     $('input.autocomplete').autocomplete({
-      data: { Apple: null, Microsoft: null, Google: 'https://via.placeholder.com/250x250' }
+      minLength: 0,
+      data: [
+        {id: 12, text: "Apple"},
+        {id: 13, text: "Microsoft"},
+        {id: 42, text: "Google", image: 'http://placehold.it/250x250'}
+      ]
+    });
+    $('input.autocomplete-multiple').autocomplete({
+      isMultiSelect: true,
+      minLength: 0,
+      data: [
+        {id: 12, text: "Apple"},
+        {id: 13, text: "Microsoft"},
+        {id: 42, text: "Google", image: 'http://placehold.it/250x250'}
+      ]
     });
     $('input[data-length], textarea[data-length]').characterCounter();