Filter: Events with registration enabled.

commit 19f5ea0ea65fc7a35ada24b1576890c6f99a4f2b
Merge: e9a1521 06aaee5
Author: Eloy Zuniga Jr <eloyz.email@gmail.com>
Date:   Wed Feb 20 17:06:05 2013 -0600

    Merge branch 'refs/heads/master' into 400_registration_filter_for_event_search

    Conflicts:
    	tendenci/addons/events/views.py

commit e9a1521f5a87b3a4c4a7407201ef3b7b9051bc0f
Author: John Eddie Ayson <je@bixly.com>
Date:   Wed Nov 14 05:01:59 2012 +0800

    added fix

commit 7bca36e3469cf5493ef57275ed00b2d79f3697e0
Author: John Eddie Ayson <je@bixly.com>
Date:   Tue Nov 13 19:38:29 2012 +0800

    added a registration filter for events search