Update scaffold_reports.py

Start date for transcript should be allowed to be in the past.
Adjusted how dates affect transcripts
Report card date changes
Added credits to StudentYearGrade cache
Merge branch 'develop' of https://github.com/burke-software/django-sis into course_sections

Conflicts:
	ecwsp/sis/scaffold_reports.py
more sections
Override final should apply to time change on course grade calculations
Merge branch 'develop' of https://github.com/burke-software/django-sis into course_sections

Conflicts:
	ecwsp/schedule/models.py
Migrated Canvas sync to course sections