add choisen gem
rails generate model Item name:string
rails generate migration create_items_products
rails generate controller Items
tempary can work
fix chosen
add search function
fix the reload bug
http://stackoverflow.com/questions/17317816/rails-javascript-only-works-after-reload
add item test
fix some javascript position
fix the model test
add item and category model test
fix expect string
Merge branch 't1'