Add compat module that stores unicode/str fixes mixin.
Add compat module that stores unicode/str fixes mixin.

pombredanne/django-hstore,pombredanne/django-hstore,Stranger6667/django-hstore,Stranger6667/django-hstore,Stranger6667/django-hstore,djangonauts/django-hstore,Stranger6667/django-hstore,pombredanne/django-hstore,djangonauts/django-hstore,djangonauts/django-hstore,djangonauts/django-hstore,pombredanne/django-hstore