Adding the initial implementation to make the Hstore queries like the Django
Making the changes inside the Manager to allow us to filter in hstore like the django. in Integer and Strings.
Making the changes to help the queries in MonetaryFields and Range filters.
Making the code more consistent and the filters in str, int e monetary are OK
Adding the changes to make the Queries more consistent and work with HstoreDatabaseWrapper from django-hstore fork in Multmeio githubs org
Hotfix: in cases of the Model has not any Parent
Merge branch 'queryset'