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
courses#index link
Merge pull request #91 from feministy/attendance

attendance page and UI tweaks
edit and update paths
link to edit in course partial
moved menu items into a conditional
Merge pull request #93 from feministy/courses_edit

Courses edit
show TA email address on the index
Merge pull request #97 from feministy/ta_emails

show TA email address on the index
new relic