add schema, view, model, controller and tests for QueueItems#index
add QueueItems#create route, controller tests, video show add button
refactor queue_items create route to eliminate redundant save fail use case
add delete QueueItem route and controller action
refactor sorting of user queue_items to method
add exists_in_queue method conditional to check queue_item duplication; fix exists_in_queue method
Merge pull request #3 from leeduan/mod2

Mod2 merged