The goal of this module is to simplify the management of the partner properties used in MRP Subcontracting.

It adds a new checkbox "Subcontractor" which when enabled creates the following entities:

* A child location in the "Subcontracting" location
* A Stock Operation Type of type 'receipt' for this location
* A new 'Buy' stock rule
* A new 'Resupply Subcontractor on Order' rule
