[ADD]Hr material:added new module hr_material,which allows you to easily...

... keep track of office materials.

- Task: https://www.odoo.com/web#id=6897&view_type=form&model=project.task
- Pad: https://pad.odoo.com/p/r.JyyLhFD93zvKcCbu
No need of decorators, as this module is new. Indeed it is not overrided and therefore no old API / new API wrappers are requested. This remark is valid for the whole module.