Merge pull request #1 from danielzhangyihao/fix-up

fix up things
update gemfile
add paperclip
add httparty gem and create repository
paperclip add s3
paperclip s3 development ok
paperclip s3 work development
gemfile update
add attr_accessible
delete attr-accessible
create and show for product
working with amazon but did not finish
products page, edit page
product page views, grid
paperclip photo size 354*354
adding default profile pic
correct path for default profile picture
change config serve static assets
gemfile
gem 'rails_serve_static_assets'