cleaned up imports i.e. made them nicer
created skeleton to create dynamic view for districs

End of day
added the districts_view template that would be used
overriding change list template so that dynamic field generation is possible
added basic structure for send sms to varying districts form
added the SendToDistrictForm function
updated district view to account for form
Updated te ChooseDistrictFomr to account for cleaned data and sms field
wrote unittests for the send to districts
added the code for send to districts from the admin
changed error message
updated error message
added sent_to_all in SendSMS model and did schemamigration
added the sent_to_all in admin functions
updated unittests for the addition of the model field
removed unused zones view
wrote unittest to check that the menu update state is available
wrote code to make test pass
wrote unittest to check if continue has been pressed.
Added code for the manage_update_school_data state