add command for loading data in a schema
add a management command for adding a client
Merge pull request #207 from saulshanabrook/feature/add-client-command

add a management command for adding a client
Merge pull request #206 from saulshanabrook/feature/loaddata-schema

add command for loading data in a schema
Terrible hotfix for enrollment save deleting grades.
Does not fix the the fact that enrollments should be set
inactive instead of deleted.
Merge branch 'master' of https://github.com/burke-software/django-sis
Updated DRF to 3.0. Probably needs more testing
Merge branch 'develop' of https://github.com/burke-software/django-sis into benchmark_experiment
Merge branch 'master' of https://github.com/burke-software/django-sis into benchmark_experiment

Conflicts:
	ecwsp/schedule/views.py
More gradebook tests and calculations