Reimplement the change_ownership form with z3c.form.
Use the Autocomplete Widget in the change ownership form.
Remove commits accidentally committed to master.

- 02c75b67 Use the Autocomplete Widget in the change ownership form.
- 8a4daddc Reimplement the change_ownership form with z3c.form.
Preparing release 2.1a2
Back to development: 2.1
gitignore added.
merge master