[srv] Improve data dumping & cart/order amount computation
[ui] Add coupon management view & controller
Merge branch 'master' of https://github.com/walien/webmarket
[srv] Some refactoring & adding coupons management features on server side
[ui] Adding coupons (commercial) management features on client side
[srv] Adding coupons deletion features
[ui] Adding coupons deletion features
[ui] Adding coupon edition and creation features on client side
[ui] Improve coupon edition & creation features
[ui] Some UI improvements