remove TA data
migration for admin emails
renamed GdiMailer to TeachingAssistantMailer
renamed GdiMailer to TeachingAssistantMailer
remove skylight
migration
admin mailer with a new TA message
link to the email system
Merge pull request #84 from feministy/admin_emails

Admins emailed when new TAs sign up; renamed GdiMailer to TeachingAssistantMailer
calculate student hours for a course based on the course start and end time
student hours in view instead of weird course hours
Merge pull request #89 from feministy/course_charges

TAs are "charged" the correct number of hours for a course as a student
validate uniqueness of TA across course so admins cannot double RSVP for a user
Merge pull request #90 from feministy/double_rsvp

validate uniqueness of TA across course so admins cannot double RSVP
remove toggle link for attendance
stylesheets for nav bar
adjust header padding
attendance route
create attendance management page
logged out menu