- explicitely define the skin folder in the proxy field's form ID field.
 - surcharge a field library for a custom project by only putting inside
   the modified fields. Untouched field can be left inside standard
   field library.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@30848 20353a03-c40f-0410-a6d1-a30d3c3de9de