Add Getter/Setter for BusinessDesc

OPEN - task 86: Create Business(Sales-Purchases) Module 
http://github.com/DevOpsDistilled/OpERP/issues/issue/86
Load model on appropriate events

OPEN - task 86: Create Business(Sales-Purchases) Module 
http://github.com/DevOpsDistilled/OpERP/issues/issue/86
Remove Amount Field & buttons

OPEN - task 86: Create Business(Sales-Purchases) Module 
http://github.com/DevOpsDistilled/OpERP/issues/issue/86
Manage UI for "Add" button

OPEN - task 86: Create Business(Sales-Purchases) Module 
http://github.com/DevOpsDistilled/OpERP/issues/issue/86