* Applied Jeremie Koenig's pluggable editpage buttons patch:

* Applied Jeremie Koenig's pluggable editpage buttons patch:
  - add a title to the editpage form;
  - pass a reference to the list of buttons to the formbuilder_setup
    hooks, so we can add ours;
  - relax asumption about the possible submit values (use "Save Page"
    explicitly);
  - de-hardcode the submit buttons from the editpage template
    (This was needed for compatability with a bug in CGI::FormBuilder
    3.0401, but ikiwiki already needs a newer version.)
* Pass buttons to all other formbuilder_setup hooks too.