Add travis config
fixed mystery bugs in models tests
added video to interviews/show.html.erb and added required javascript files
updated database schema, changed Challenge model to have public field, not private
code review: update Challenge
code review: update companies controller
code review: update sessions controller
code review: update employees controller
code review: update Interview model, before_create callback instead of before_save and updated model tests
added form to go directly to an interview and added flash div to layout to hold error messages
added quiet_assests gem
update Challenge model test to test for mass assignment to public, not private
Refactoring code editor js
removed unnecessary views for challenges
prevent unauthorized users from accessing or editing challenges