gitignored build and dist, added date template with help_text

.gitignore

@@ -1,3 +1,5 @@
 *.pyc
 ckanext_scheming.egg-info/*
 links/*
+build/*
+dist/*

ckanext/scheming/templates/scheming/form_snippets/date.html

@@ -0,0 +1,18 @@
+{% import 'macros/form.html' as form %}
+{% call form.input(
+        field.field_name,
+        id='field-' + field.field_name,
+        label=h.scheming_language_text(field.label),
+        placeholder=h.scheming_language_text(field.form_placeholder),
+        type='date',
+        value=data[field.field_name],
+        error=errors[field.field_name],
+        classes=['control-medium'],
+        attrs=field.form_attrs if 'form_attrs' in field else {},
+        is_required=h.scheming_field_required(field)
+        )
+    %}
+{% if field.help_text %}
+{{ form.info(text=field.help_text, inline=true) }}
+{% endif %}
+{% endcall %}