Merge pull request #66 from tf/dw-url

Fix Datawrapper create chart url

Author: tf

app/assets/javascripts/pageflow/chart/editor/templates/datawrapper_ad.jst.ejs

@@ -1,4 +1,4 @@
-<form action="https://datawrapper.de/chart/create" method="POST" target="_blank">
+<form action="https://app.datawrapper.de/create/chart" method="GET" target="_blank">
   <input type="hidden" name="theme" value="pageflow" />
   <input type="submit" value="<%= I18n.t('pageflow.chart.editor.templates.datawrapper_ad.create_chart') %>" />
 </form>