Merge pull request #73 from feministy/rsvp_series

TAs can now RSVP for an entire series of courses
directions for running locally
Corrected error page on signup
Switched order of routes so /teaching_assistants/thanks now precedes /teaching_assistants/:private_id
Merge pull request #77 from MLBerns/stable

Corrected error page on signup
remove sign_ups_path and replaced with teaching_assistant_path
Merge pull request #78 from feministy/sign_ups_path_fix

remove sign_ups_path and replaced with teaching_assistant_path
set a max-height on the modal
modal responsive for iphone
Merge pull request #82 from feministy/modal

modal auto height for full screens and mobile
Merge pull request #83 from feministy/stable

get staging up to speed with prod