Add init_tinymce4 for tinymce 4.x (WIP)
Clean up init file for tinymce4.
Merge branch 'next' into tabbed_options

* next:
  Clean up init file for tinymce4.
  Add init_tinymce4 for tinymce 4.x (WIP)

Conflicts:
	feincms/templates/admin/content/richtext/init_tinymce4.html