init
update README.md
add bootstrap.css
generate welcome controller
prototype for main page
Merge branch 'feature/welcome' into develop

* feature/welcome:
  prototype for main page
  generate welcome controller
facebook login feature with omniauth
basic structure for item
basic structure for adding new item
update item : migrate price and update view
update item order and pagination
facebook comments and like per items
update new_item page view
update item partial
update view : for item
Merge branch 'feature/modeling-items' into develop

* feature/modeling-items:
  update view : for item
  update item partial
  update new_item page view
  facebook comments and like per items
  update item order and pagination
  update item : migrate price and update view
  basic structure for adding new item
  basic structure for item
update login alert
update profile page
update link in header
categorize all / buy / sell / share ...