better detection of node forms in fieldgroup_form_alter (was causing warnings on views with exposed filters)

#168526 followup : import/export display settings - fix typo I introduced when committing the patch.

A little more cleanup of the option to use views for nodereference select lists. Using views for autocomplete is not yet working.

Re-implement the option to use a view to populate the nodereference selector. Still needs more work, but is basically functional for a select list. Nothing done yet about handling arguments or filters or using this in an autocomplete.

#233364 More work on the conversion of Views 1 field data to match the final Views patch. No good way to get $count in the hook, we may need a Views patch for that.

#219566 Make sure allowed values fieldset is expanded when using optionwidgets with text or number, and fix broken handling of additional description of how to fill it out.

#235247, #235224, #224614, fix validation problems with optionwidgets, nodereference, and userreference. This fix gets the forms working correctly and options are saved as they should be. The default value selector in field settings is still broken with this fix, but the node forms now work correctly.

#233364 Changing the Views field name is going to break other things. Change this back to field name and handle the discrepency with the hook in content.views_convert.inc instead.

#233364 Make sure field names used in Views 2 map to field names used in Views 1 so we can more easily import Views 1 views into Views 2. With this change the import code in that issue will correctly pick up CCK fields and import them automatically. We still need to implement hook_views_convert() to update options and values, and there may still be other things that need to be adapted.

- default Empty / Not empty filter for all fields
  (still triggers a few warnings when used as exposed filters)
- very early beginnings of 'relationships' for nodereferences.
  Doesn't do anything yet.

Untested...

No need to force-add the 'enctype / multipart' thing anymore. Widgets now have direct acces to the $form array and can set it if they need.

Mainly doc stuff.

Should have used the new file name format of $module.$something.inc on the new content token inc file.

#172127 remove content_pathauto.inc and add in content_token.inc. Pathauto no longer uses the code in content_pathauto.inc and we need to get the tokens to a place where we can control them.