Added button where itinerary will be added

Button doesnt function yet, it is only a stub for now.
Itinerary Page

Got rid of button, and "View Itinerary" now links to new page.
Adding Items

Set up the itinerary page to view items/add them.
Just need to know how we want them to work.
Made the input box id's unique to avoid errors in the console.
Changed adding itinerary layout

Separated the add/view itinerary to be their own pages.
Merged Pages

Merged the pages trip/itinerary/add itinerary.
Removed un-needed line

Forgot to remove one line where old link was.
New layout

Removed all fields for the showing of itinerary so we can use modals
instead.
simplify itinerary item model
test creation of itinerary items
add itinerary items to /trips/:trip_id
add itinerary items to frontend trips view
style changes
application.js changes
added modal

Modal does not function properly yet, just showing how it will look for
now.
Modal Fields

Not able to save/store yet, but able to enter data into the modal
fields, and close them.
refactor itinerary item controller's get and post

also write some real tests
move itinerary item controller test stuff 

into a separate file
test and refactor /items/:itemid
refactor and test updating trip items.