[srv] Enhance mongoDB persistence support with some verbose logging
[srv] Improve cart & order business rules
[ui] Improve business objects structure
[srv] Manage coupons on persistence support & harmonize Cart & Orders aspects
[ui] Manage coupons on cart & order aspects
[ui] Improve coupons on cart & order aspects
Merge branch 'master' of https://github.com/walien/webmarket