cart and category
Merge pull request #4 from Tneconni/master

commit the header style sheet
adjustment header link and category
adjust homepage link and cart access validation
add the account link
simplify the checkout workflow
the shopping cart
finish the section classifing products to model and printer
adjust the BE order section
merge the cloud section
3 choice
distinguish sql
distinguish model and printer
user upload model for order
Merge branch 'master' of https://github.com/DavidWangQD/feimao into tmp_merge

Conflicts:
	catalog/view/theme/default/stylesheet/style.less
	catalog/view/theme/default/template/common/home.tpl
	catalog/view/theme/default/template/static/print_market.tpl
	catalog/view/theme/default/template/static/print_type.tpl