start adding attachments
assignments and attachments can be added, edited, deleted
Merge branch 'assignments'
do more with assignments and uploads
Updates seeds file to change all emails to @example.com
Merge branch 'master' of github.com:vaidehijoshi/Clipboard
email slightly works
email actually works
Merge branch 'youve-got-mail' into master-copy
teachers can create and update scores on assignment show
Merge branch 'grades'
updates header and creates nav bar, updates teacher show page and student show page with stylezzzzzz
Merge branch 'master' into groupings

Conflicts:
	app/models/course_section.rb
	app/models/student.rb