add trips_controller_spec.rb
add Get specs for trips_controller
delete empty line
add specs for #Post in trips_controller_spec
update #create in trips_controller
add specs for trips controller #update
udpate trips controller #update action
add specs for #destroy in trips controller
udpate itineraries controller specs
update itineraries controller to re-render template instead of redirect for invalid attributes
update single views
Merge pull request #21 from Edchen001/add_specs_for_trips_controller

Add specs for trips controller