apps.core.models.static_feedback: Forward kwargs in from_points().
apps.cire.models.static_feedback: Make specifying assignment optional for from_points().
devilry_gradingsystem.models: Added to_staticfeedback().
devilry_gradingsystem.views.feedbackeditorbase: Use to_staticfeedback.
devilry_gradingsystem: Preview view.
devilry_gradingsystem.views.feedbackeditorbase: Better edit button bar.
devilry_gradingsystem...feedbackeditorbase: Removed commented out code.
devilry_gradingsystem...feedbackbuttonholder: Prefix the names with ``submit_``.
devilry_examiner...singledelivery: Updated styles for submit_ prefix.
devilry_gradingsystem: Preview workflow.
devilry_gradingsystem: Styled the preview footer.
Merge branch 'new-examiner' of github.com:devilry/devilry-django into new-examiner