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.
from django.contrib import admin
from pytask.taskapp.models import Task, TaskComment, TaskClaim,\
WorkReport, ReportComment, PyntRequest,\
TextBook
admin.site.register(Task)
admin.site.register(TaskComment)
admin.site.register(TextBook)
admin.site.register(WorkReport)
admin.site.register(TaskClaim)
admin.site.register(ReportComment)
admin.site.register(PyntRequest)