Hl-plone-boardnotifications

-------------------

------------------

- do not try to send notification e-mail if destination address is not available (rafaelbco)
- use an OOBTree for storing subscriptions

------------------

- fix event handler (move subscriptions)

------------------

- when a thread is moved to another forum, move the subscriptions as well
- notify subscribers when a thread is moved

------------------

- Make sure commenttext is unicode (jean)
- Make it not fail when deleting the PloneSite (rafaelbco)

------------------

- meaningful viewlet names