#16 fixed login (stay in logged)
#21 Create entity for relational table
#21 fixed a bug
#19 Get user data and modify user data.
#18 display user datas and edit page.
Merge branch 'master' of https://github.com/szelli/Goods-Exchange
#18 remove the comments
#19 Edit user datas
#18 FrontEnd edit user datas
#20 Added product upload design and product modify
#20 Added product upload design and product modify
#20 Added product update to frontend
#20 Added fake product to test the product update