Require modifications in VTiger CRM

The complete task is to: 1. Require easy way to import and update Pricebooks in bulk using CSV. Current import action creates a new record every time, whereas we also require updation in bulk using CSV. 2. Integrate Pricebooks with Organisations such that choosing an Organisation in Invoice auto-fills price for Products in Invoices and Quotes. 3. Stop manual entry of price in Invoice and Quotes for non-admin user 4. If no Pricebook is linked to a particular Organisation, then selecting that Organisation during Invoice creation should show error "Please select a Pricebook for this Organisation" Work will be done using Git. If required, you may have to create bitbucket account. Please apply only if confident of the tasks above. Further work can be provided upon successful completion of the project.