src/tasks_model.py  BEGIN IMPLEMENTING
tsts/tasks_model_tests() =>  None
src/tasks_model.py  FIX  call to data.ShelverDb NEEDED ().
tsts/tasks_model_tests() =>  ADDED test__init for two models
src/tasks_model.py  FIX  call to data.ShelverDb NEEDED ().
tsts/tasks_model_tests() =>  ADDED test__init for three models
Merge branch 'master' into BUILD_tasks_model

Conflicts:
	src/tasks_model.py