Change all the queries to Textbook model to Tasks.
Since Textbook model is deprecated now, implemented the changes
in the views to query respected queries and make corresponding
changes in the views.
#! /bin/bash
pg_dump pytask -U pytask -W > ~/pytaskdbdumps/dbdump`date +%Y%m%d%H%M%s`.dump
./bin/django dumpscript > ~/pytaskdbdumps/dbdumpscript`date +%Y%m%d%H%M%s`.dump
./bin/django dumpdata > ~/pytaskdbdumps/dbdumpdata`date +%Y%m%d%H%M%s`.dump
./bin/django schemamigration profile --auto
./bin/django migrate profile