Merge pull request #23 from alexcodreanu86/carousel

Carousel
refactored box-shaddow code into shaddowed class
authorizing user on show and index
user has many trips
updated the edit with all new fields
added box shaddow to form
wrapped form in shaddowed div
wrapped contents in shaddowed boxes
wrapped content in shaddowed box
Merge branch 'master' of http://github.com/alexcodreanu86/nitar into carousel