0.7 release
0.7 release

* Python 3 support!
* 'strip' flag for addtoblock
* Watcher API (for caching)
* Various bug fixes

jproffitt/django-sekizai,matuu/django-sekizai,ojii/django-sekizai,matuu/django-sekizai,ojii/django-sekizai,jproffitt/django-sekizai