This field was needed because a rating could be sent to a customer for a task or an issue.
This was buggy, because if a template was set on a shared stage between tasks and issues, the rendering could crash, generate an email with wrong piece of information, and so on.
By removing this field, we can also remove some ugly code that was needed to make that distinction.
Split project to move portal features to a new module named website_project.
Portal users may now access their projects and tasks throught the
website_portal My account page. The Backend portal menuitem is removed.
Simplify the privacy settings of project, to be visible to portal users the
project must be in 'portal' mode.
Original authors: Vipul Bhatt, Florian Wintjens
Jérome Maes