[FIX] HTML row
[FIX] point_of_sale: prevent changing the customer after printing the receipt
[FIX] project_issue: project issue user must be able to read resource calendar

In order to be able to read the days_since_creation field
[FIX] point_of_sale: updated the tooltip for the to weight option to make it clearer that it is to be used with the hardware scale integration
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-linux64