Revert #780566 by stella, add drupal_alter() for content_allowed_values lists created by userreference and nodereference, needs more thought.

Also need to re-name the autocomplete module to the new node_reference and user_reference module names.

#699066 by litwol and chx : add meta data to the 'referenceable nodes / users' queries for easier tracking

#383038 by markDrupal - Userreference: fix broken 'reverse links' with fields in per-type table (as a TODO reminder for now)

Port of #399778 by Benjamin Melençon - Nodereference / Userreference: Add 'size' setting to autocomplete widgets.
+ fixes hook_field_widget_settings_form() implementations in user_ref and node_ref.

Remove demofield module that is really not needed any more with the UI working. Also do some more work toward getting node_reference and user_reference working. Not done yet, but fewer errors :)

#368155 Nodereference/Userreference: Fix performance issue on large sites when validating empty noderef/userref fields.

Synch HEAD with latest Bazaar code so this version will work with core Fields in Core patch. CCk code mostly working but still needs work.