Tryton application platform - project plan module

 Tryton is a high-level general purpose application platform. It is the base
 of a complete business solution as well as a comprehensive health and hospital
 information system (GNUHealth).
 .
 This module adds planning capabilities on projects.
 It provides
  - Task dependencies
  - Tasks leveling
  - Early Start and Late End computation
  - Resource allocation
  - Requests