Merge pull request #3 from njeudy/project_backlog_stage

Project backlog stage
Merge pull request #4 from njeudy/master

New: add a way of using current sprint:
fix: clean *pyc files
Fix: reorder includes
chg: update project.project model to V8 api
chg: update project.scrum.releaase to v8 api
chg: update to api V8:

- Add onchange method for product_owner and scrum master inheritance on sprint
new: add product_owner and scrum master on release form.
new: add scrum_master and product_owner on project

- This will be default value when creating a release on the project.
Merge branch 'po_sm_inheritance' into master-1

- Add defeault product_owner and scrum_master on project
- When creating a release, product_owner and scrum_master are inherited from project (onchange)
- When creating a sprint, product_owner and scrum_master are inherited from release (onchange)
- Initial changes for V8 api
fix: change include ordre for xml to load actions before menus
new: add count on release from project:

- count number of release / project
- update kanban view with new link
- add special action to be able to filter, and update context and domain for releases.
new: add `code` field on backlog stages with some special keywords:

- "first": is for sandbox stories stages
- "pending": is for pending stories stages

The first one of the stage with this keywords found for the project will be used.
fix: _compute method wasn't correctly update to V8 api.
new: filter release on project by default on views.
new: user can edit code directly from tree view.
new: add user_id on sandbox tree view
new: count backlogs on project:

- count backlog for a project
- Add link and associated action on kanban view
new: add count on sandbox stories

- add count for sandbox stories by project
- add link and action on project kanban view
new: add count on sprint:

- count sprint by project
- add link and action on project kanban view