Make the gem compatible with turbolinks

Author: Anton Khamets

app/assets/javascripts/active_admin_datetimepicker.js.coffee

@@ -14,7 +14,7 @@
     options = $(entry).data 'datepicker-options'
     $(entry).datetimepicker $.extend(defaults, options)
 
-$ ->
+$(document).on 'ready turbolinks:load', ->
   setupDateTimePicker $('body')
   $(document).on 'has_many_add:after', '.has_many_container', (e, fieldset) ->
-    setupDateTimePicker fieldset
+    setupDateTimePicker fieldset