User will be redirected to root path if trying to access private data

  *options_controller#index
  *trips_controller#show
  *updated trips_controller_spec to still pass
refactored trips_controller#create to not use instance variable
added controller tests for this feature
Merge branch 'master' into check_for_session
Merge pull request #69 from LightningLord/check_for_session

Check for session