add discussion controller files
add discussion integration test
add #index page test
add discussions route
add index action, scope
add index view
add discussion index page
add discussions to nav
add #show page tests
add show view
add set discussion before action
add #show page
fix discussion factory title length
fix start discussion link css class
add new discussion authentication failure tests
move require_login filter to app controller
move require_login filter to app controller
fix discussion factory title length
add discussion new page tests
add passing new discussion page