taxonomy field type that lists input fields for every defined taxonomy [fix #53]

themes/grav/templates/forms/fields/taxonomy/taxonomy.html.twig

@@ -0,0 +1,14 @@
+{% set taxonomies = (taxonomies is null ? admin.data('site').taxonomies : taxonomies) %}
+{% set parentname = field.name %}
+{% for name in taxonomies %}
+
+    {% set field = {
+        type: 'text',
+        classes: 'fancy',
+        label: name|capitalize,
+        name: parentname ~ '.' ~ name
+    } %}
+    {% set value = data.value('header.taxonomy.' ~ name) %}
+
+    {% include ['forms/fields/text/text.html.twig'] %}
+{% endfor %}